1
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Bonato B, Bennett T, Guerra S, Avesani S, Castiello U. Do strigolactones play a role in the ascent and attachment behavior of Pisum sativum? PLANT SIGNALING & BEHAVIOR 2025; 20:2447455. [PMID: 39745925 DOI: 10.1080/15592324.2024.2447455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2024] [Revised: 12/19/2024] [Accepted: 12/22/2024] [Indexed: 01/04/2025]
Abstract
Strigolactones (SLs) are signaling compounds made by plants. They play a crucial role in acting as long-distance signals from root to shoot to coordinate shoot growth with root environmental conditions. Here, we test whether and how SLs play a role in the climbing behavior of pea plants by studying the circumnutation of the tendrils using three-dimensional (3D) kinematical analysis. To assess this, we compare the typical behavior of P. sativum, a wild-type plant that produces and perceives SLs, with mutants defective in SLs synthesis or signaling, known as ramosus(rms) mutants. The results indicate that mutant plants seem unable to locate and grasp a potential support. Their movement appears to be disoriented and much less energized. We contend that this research opens new avenues for exploring SLs' role in plant behavior, a novel lens through which the role of SLs in root-to-shoot communication can be observed and analyzed.
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Affiliation(s)
- Bianca Bonato
- Department of General Psychology, University of Padova, Padova, Italy
| | - Tom Bennett
- Faculty of Biological Science, University of Leeds, Leeds, UK
| | - Silvia Guerra
- Department of General Psychology, University of Padova, Padova, Italy
| | - Sara Avesani
- Department of General Psychology, University of Padova, Padova, Italy
| | - Umberto Castiello
- Department of General Psychology, University of Padova, Padova, Italy
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2
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Cunningham AL, Sandgren KJ, Taylor J. Current status of immunisation for herpes zoster. Hum Vaccin Immunother 2025; 21:2445384. [PMID: 39761810 DOI: 10.1080/21645515.2024.2445384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2024] [Revised: 12/05/2024] [Accepted: 12/18/2024] [Indexed: 01/11/2025] Open
Abstract
Herpes zoster (HZ) is increasingly common in the aging and is experienced by approximately one in three people in their lifetime. It is also relatively common in immune-compromised people. Acute HZ causes severe pain, reduced quality of life and severe complications, including prolonged pain, or postherpetic neuralgia (PHN), and ocular zoster, which may rarely progress to blindness. In severely immune-compromised people disseminated zoster may affect the brain and liver. A second-generation vaccine, the Recombinant Zoster Vaccine, consisting of recombinant viral glycoprotein E and the Adjuvant System 01 (AS01B), now offers >90% efficacy against HZ and associated complications in immune-competent people. Efficacy persists above 80% for 11 years. In severely immune-compromised patients, the vaccine is safe with efficacy and/or immunogenicity of 68-87%. There is also excellent immunogenicity for those on JAK inhibitors and corticosteroid therapy. The vaccine offers a paradigm for successful and durable immunization in the aging and immune-compromised.
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Affiliation(s)
- Anthony Lawrence Cunningham
- Centre for Virus Research, The Westmead Institute for Medical Research, Westmead, NSW, Australia
- Sydney Institute for Infectious Disease (Sydney ID) at the Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - Kerrie Jane Sandgren
- Centre for Virus Research, The Westmead Institute for Medical Research, Westmead, NSW, Australia
- Sydney Institute for Infectious Disease (Sydney ID) at the Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - Janette Taylor
- Centre for Virus Research, The Westmead Institute for Medical Research, Westmead, NSW, Australia
- Centre for Infectious Diseases and Microbiology Laboratory Services, Westmead Hospital, Westmead, NSW, Australia
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3
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Liang Z, Wang S, Zhu X, Ma J, Yao H, Wu Z. A small RNA from Streptococcus suis epidemic ST7 strain promotes bacterial survival in host blood and brain by enhancing oxidative stress resistance. Virulence 2025; 16:2491635. [PMID: 40237541 PMCID: PMC12005413 DOI: 10.1080/21505594.2025.2491635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2024] [Revised: 10/30/2024] [Accepted: 04/04/2025] [Indexed: 04/18/2025] Open
Abstract
Streptococcus suis is a Gram-positive pathogen causing septicaemia and meningitis in pigs and humans. However, how S. suis maintains a high bacterial load in the blood and brain is poorly understood. In this study, we found that a small RNA rss03 is predominantly present in S. suis, Streptococcus parasuis, and Streptococcus ruminantium, implying a conserved biological function. rss03 with a size of 303 nt mainly exists in S. suis sequence type (ST) 1 and epidemic ST7 strains that are responsible for human infections in China. Using MS2-affinity purification coupled with RNA sequencing (MAPS), proteomics analysis, and CopraRNA prediction, 14 direct targets of rss03 from an ST7 strain were identified. These direct targets mainly involve substance transport, transcriptional regulation, rRNA modification, and stress response. A more detailed analysis reveals that rss03 interacts with the coding region of glpF mRNA, and unexpectedly rss03 protects glpF mRNA from degradation by RNase J1. The GlpF protein is an aquaporin, contributes to S. suis oxidative stress resistance by H2O2 efflux, and facilitates bacterial survival in murine macrophages RAW264.7. Finally, we showed that rss03 and GlpF are required to maintain a high bacterial load in mouse blood and brain. Our study presents the first sRNA targetome in streptococci, enriches the knowledge of sRNA regulation in streptococci, and identifies pathways contributing to S. suis pathogenesis.
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Affiliation(s)
- Zijing Liang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Key Lab of Animal Bacteriology, Ministry of Agriculture, Nanjing, China
- WOAH Reference Lab for Swine Streptococcosis, Nanjing, China
| | - Shuoyue Wang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Key Lab of Animal Bacteriology, Ministry of Agriculture, Nanjing, China
- WOAH Reference Lab for Swine Streptococcosis, Nanjing, China
| | - Xinchi Zhu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Key Lab of Animal Bacteriology, Ministry of Agriculture, Nanjing, China
- WOAH Reference Lab for Swine Streptococcosis, Nanjing, China
| | - Jiale Ma
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Key Lab of Animal Bacteriology, Ministry of Agriculture, Nanjing, China
- WOAH Reference Lab for Swine Streptococcosis, Nanjing, China
| | - Huochun Yao
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Key Lab of Animal Bacteriology, Ministry of Agriculture, Nanjing, China
- WOAH Reference Lab for Swine Streptococcosis, Nanjing, China
| | - Zongfu Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
- Key Lab of Animal Bacteriology, Ministry of Agriculture, Nanjing, China
- WOAH Reference Lab for Swine Streptococcosis, Nanjing, China
- Guangdong Provincial Key Laboratory of Research on the Technology of Pig-Breeding and Pig-Disease Prevention, Guangdong Haid Institute of Animal Husbandry & Veterinary, Guangzhou, China
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4
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Valle J. Biofilm-associated proteins: from the gut biofilms to neurodegeneration. Gut Microbes 2025; 17:2461721. [PMID: 39898557 PMCID: PMC11792866 DOI: 10.1080/19490976.2025.2461721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2024] [Revised: 12/07/2024] [Accepted: 01/28/2025] [Indexed: 02/04/2025] Open
Abstract
Human microbiota form a biofilm with substantial consequences for health and disease. Numerous studies have indicated that microbial communities produce functional amyloids as part of their biofilm extracellular scaffolds. The overlooked interplay between bacterial amyloids and the host may have detrimental consequences for the host, including neurodegeneration. This work gives an overview of the biofilm-associated amyloids expressed by the gut microbiota and their potential role in neurodegeneration. It discusses the biofilm-associated proteins (BAPs) of the gut microbiota, maps the amyloidogenic domains of these proteins, and analyzes the presence of bap genes within accessory genomes linked with transposable elements. Furthermore, the evidence supporting the existence of amyloids in the gut are presented. Finally, it explores the potential interactions between BAPs and α-synuclein, extending the literature on amyloid cross-kingdom interactions. Based on these findings, this study propose that BAP amyloids act as transmissible catalysts, facilitating the misfolding, accumulation, and spread of α-synuclein aggregates. This review contributes to the understanding of complex interactions among the microbiota, transmissible elements, and host, which is crucial for developing novel therapeutic approaches to combat microbiota-related diseases and improve overall health outcomes.
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Affiliation(s)
- Jaione Valle
- Microbial Biotechnology Department, Instituto de Agrobiotecnología, CSIC-Gobierno de Navarra, Mutilva, Navarra, Spain
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5
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Lin Y, Wang J, Bu F, Zhang R, Wang J, Wang Y, Huang M, Huang Y, Zheng L, Wang Q, Hu X. Bacterial extracellular vesicles in the initiation, progression and treatment of atherosclerosis. Gut Microbes 2025; 17:2452229. [PMID: 39840620 DOI: 10.1080/19490976.2025.2452229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2024] [Revised: 11/13/2024] [Accepted: 01/07/2025] [Indexed: 01/23/2025] Open
Abstract
Atherosclerosis is the primary cause of cardiovascular and cerebrovascular diseases. However, current anti-atherosclerosis drugs have shown conflicting therapeutic outcomes, thereby spurring the search for novel and effective treatments. Recent research indicates the crucial involvement of oral and gastrointestinal microbiota in atherosclerosis. While gut microbiota metabolites, such as choline derivatives, have been extensively studied and reviewed, emerging evidence suggests that bacterial extracellular vesicles (BEVs), which are membrane-derived lipid bilayers secreted by bacteria, also play a significant role in this process. However, the role of BEVs in host-microbiota interactions remains insufficiently explored. This review aims to elucidate the complex communication mediated by BEVs along the gut-heart axis. In this review, we summarize current knowledge on BEVs, with a specific focus on how pathogen-derived BEVs contribute to the promotion of atherosclerosis, as well as how BEVs from gut symbionts and probiotics may mitigate its progression. We also explore the potential and challenges associated with engineered BEVs in the prevention and treatment of atherosclerosis. Finally, we discuss the benefits and challenges of using BEVs in atherosclerosis diagnosis and treatment, and propose future research directions to address these issues.
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Affiliation(s)
- Yuling Lin
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Center for Clinical Laboratory, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jingyu Wang
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Fan Bu
- Institute of Hematology, Zhejiang Engineering Laboratory for Stem Cell and Immunotherapy, Zhejiang University, Hangzhou, China
| | - Ruyi Zhang
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Junhui Wang
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yubing Wang
- Center for Clinical Laboratory, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Mei Huang
- Center for Clinical Laboratory, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yiyi Huang
- Center for Clinical Laboratory, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Lei Zheng
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Qian Wang
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Center for Clinical Laboratory, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Xiumei Hu
- Department of Laboratory Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
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6
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Megli CJ, Carlin SM, Giacobe EJ, Hillebrand GH, Hooven TA. Virulence and pathogenicity of group B Streptococcus: Virulence factors and their roles in perinatal infection. Virulence 2025; 16:2451173. [PMID: 39844743 PMCID: PMC11758947 DOI: 10.1080/21505594.2025.2451173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2024] [Revised: 12/02/2024] [Accepted: 01/05/2025] [Indexed: 01/24/2025] Open
Abstract
This review summarizes key virulence factors associated with group B Streptococcus (GBS), a significant pathogen particularly affecting pregnant women, fetuses, and infants. Beginning with an introduction to the historical transition of GBS from a zoonotic pathogen to a prominent cause of human infections, particularly in the perinatal period, the review describes major disease manifestations caused by GBS, including sepsis, meningitis, chorioamnionitis, pneumonia, and others, linking each to specific virulence mechanisms. A detailed exploration of the genetic basis for GBS pathogenicity follows, emphasizing the roles of capsules in pathogenesis and immune evasion. The paper also examines the molecular structures and functions of key GBS surface proteins, such as pili, serine-rich repeat proteins, and fibrinogen-binding proteins, which facilitate colonization and disease. Additionally, the review discusses the significance of environmental sensing and response systems, like the two-component systems, in adapting GBS to different host environments. We conclude by addressing current efforts in vaccine development, underscoring the need for effective prevention strategies against this pervasive pathogen.
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Affiliation(s)
- Christina J. Megli
- Department of Obstetrics and Gynecology, University of Pittsburgh School of Medicine, Pittsburgh, USA
- Magee-Womens Research Institute, UPMC Medical Center, Pittsburgh, USA
| | - Sophia M. Carlin
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, USA
| | - Elizabeth J. Giacobe
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, USA
| | - Gideon H. Hillebrand
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, USA
| | - Thomas A. Hooven
- Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, USA
- R.K. Mellon Institute for Pediatric Research, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, USA
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7
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Zhang C, Zhou T, Li C, Wang D, Tao J, Zhu X, Lu J, Ni J, Yao YF. Deciphering novel enzymatic and non-enzymatic lysine lactylation in Salmonella. Emerg Microbes Infect 2025; 14:2475838. [PMID: 40035788 PMCID: PMC11924271 DOI: 10.1080/22221751.2025.2475838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2024] [Revised: 02/01/2025] [Accepted: 02/28/2025] [Indexed: 03/06/2025]
Abstract
Lysine lactylation, a novel post-translational modification, is involved in multiple cellular processes. The role of lactylation remains largely unknown, especially in bacteria. Here, we identified 1090 lactylation sites on 469 proteins by mass spectrometry in Salmonella Typhimurium. Many proteins involved in metabolic processes, protein translation, and other biological functions are lactylated, with lactylation levels varying according to the growth phase or lactate supplementation. Lactylation is regulated by glycolysis, and inhibition of L-lactate utilization can enhance lactylation levels. In addition to the known lactylase in E. coli, the acetyltransferase YfiQ can also catalyse lactylation. More importantly, L-lactyl coenzyme A (L-La-CoA) and S,D-lactoylglutathione (LGSH) can directly donate lactyl groups to target proteins for chemical lactylation. Lactylation is involved in Salmonella invasion of eukaryotic cells, suggesting that lactylation is crucial for bacterial virulence. Collectively, we have comprehensively investigated protein lactylome and the regulatory mechanisms of lactylation in Salmonella, providing valuable insights into studying lactylation function across diverse bacterial species.
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Affiliation(s)
- Chuanzhen Zhang
- Laboratory of Bacterial Pathogenesis, Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, People's Republic of China
| | - Tao Zhou
- Laboratory of Bacterial Pathogenesis, Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Chengxi Li
- Anhui Key Laboratory of Infection and Immunity, Department of Microbiology, Bengbu Medical College, Bengbu, People's Republic of China
| | - Danni Wang
- Laboratory of Bacterial Pathogenesis, Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jing Tao
- Laboratory of Bacterial Pathogenesis, Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Xiaocen Zhu
- Core Facility of Basic Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jie Lu
- Department of Infectious Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jinjing Ni
- Laboratory of Bacterial Pathogenesis, Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Yu-Feng Yao
- Laboratory of Bacterial Pathogenesis, Shanghai Institute of Immunology, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
- Department of Infectious Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
- State Key Laboratory of Microbial Metabolism, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
- Shanghai Key Laboratory of Emergency Prevention, Diagnosis and Treatment of Respiratory Infectious Diseases, Shanghai, People's Republic of China
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8
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Liu C, Wei Y, Dang Y, Batool W, Fan X, Hu Y, He Z, Zhang S. Decarboxylase mediated oxalic acid metabolism is important to antioxidation and detoxification rather than pathogenicity in Magnaporthe oryzae. Virulence 2025; 16:2444690. [PMID: 39814555 PMCID: PMC11776485 DOI: 10.1080/21505594.2024.2444690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2024] [Revised: 10/18/2024] [Accepted: 12/13/2024] [Indexed: 01/18/2025] Open
Abstract
Oxalic acid (OA), an essential pathogenic factor, has been identified in several plant pathogens, and researchers are currently pursuing studies on interference with OA metabolism as a treatment for related diseases. However, the metabolic route in Magnaporthe oryzae remains unknown. In this study, we describe D-erythroascorbic acid-mediated OA synthesis and its metabolic and clearance pathways in rice blast fungus. By knocking out the D-arabino-1,4-lactone oxidase gene (Moalo1), one-third of oxalic acid remained in M. oryzae, indicating a main pathway for oxalic acid production. M. oryzae OxdC (MoOxdC) is an oxalate decarboxylase that appears to play a role in relieving oxalic acid toxicity. Loss of Mooxdc does not affect mycelial growth, conidiophore development, or appressorium formation in M. oryzae; however, the antioxidant and pathogenic abilities of the mutant were enhanced. This is owing to Mooxdc deletion upregulated a series of OA metabolic genes, including the oxalate oxidase gene (Mooxo) and Moalo1, as well as both OA transporter genes. Simultaneously, as feedback to the tricarboxylic acid (TCA) cycle, the decrease of formic acid in ΔMooxdc leads to the reduction of acetyl-CoA content, and two genes involved in the β-oxidation of fatty acids were also upregulated, which enhanced the fatty acid metabolism of the ΔMooxdc. Overall, this work reveals the role of OA in M. oryzae. We found that OA metabolism was mainly involved in the growth and development of M. oryzae, OA as a byproduct of D-erythroascorbic acid after removing H2O2, the OA-associated pathway ensures the TCA process and ATP supply.
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Affiliation(s)
- Chang Liu
- The Key Laboratory for Extreme-Environmental Microbiology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yi Wei
- The Key Laboratory for Extreme-Environmental Microbiology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yuejia Dang
- College of Life and Health, Dalian University, Dalian, China
| | - Wajjiha Batool
- The Key Laboratory for Extreme-Environmental Microbiology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Xiaoning Fan
- The Key Laboratory for Extreme-Environmental Microbiology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Yan Hu
- The Key Laboratory for Extreme-Environmental Microbiology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
| | - Zhengquan He
- Key Laboratory of Three Gorges Regional Plant Genetics and Germplasm Enhancement (CTGU)/Biotechnology Research Center, Three Gorges University, Yichang, China
| | - Shihong Zhang
- The Key Laboratory for Extreme-Environmental Microbiology, College of Plant Protection, Shenyang Agricultural University, Shenyang, China
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9
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Boulund U, Thorsen J, Trivedi U, Tranæs K, Jiang J, Shah SA, Stokholm J. The role of the early-life gut microbiome in childhood asthma. Gut Microbes 2025; 17:2457489. [PMID: 39882630 PMCID: PMC11784655 DOI: 10.1080/19490976.2025.2457489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2024] [Revised: 12/05/2024] [Accepted: 01/17/2025] [Indexed: 01/31/2025] Open
Abstract
Asthma is a chronic disease affecting millions of children worldwide, and in severe cases requires hospitalization. The etiology of asthma is multifactorial, caused by both genetic and environmental factors. In recent years, the role of the early-life gut microbiome in relation to asthma has become apparent, supported by an increasing number of population studies, in vivo research, and intervention trials. Numerous early-life factors, which for decades have been associated with the risk of developing childhood asthma, are now being linked to the disease through alterations of the gut microbiome. These factors include cesarean birth, antibiotic use, breastfeeding, and having siblings or pets, among others. Association studies have highlighted several specific microbes that are altered in children developing asthma, but these can vary between studies and disease phenotype. This demonstrates the importance of the gut microbial ecosystem in asthma, and the necessity of well-designed studies to validate the underlying mechanisms and guide future clinical applications. In this review, we examine the current literature on the role of the gut microbiome in childhood asthma and identify research gaps to allow for future microbial-focused therapeutic applications in asthma.
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Affiliation(s)
- Ulrika Boulund
- Copenhagen Prospective Studies on Asthma in Childhood, Copenhagen University Hospital, Herlev-Gentofte, Gentofte, Denmark
| | - Jonathan Thorsen
- Copenhagen Prospective Studies on Asthma in Childhood, Copenhagen University Hospital, Herlev-Gentofte, Gentofte, Denmark
| | - Urvish Trivedi
- Copenhagen Prospective Studies on Asthma in Childhood, Copenhagen University Hospital, Herlev-Gentofte, Gentofte, Denmark
- Section of Microbiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Kaare Tranæs
- Copenhagen Prospective Studies on Asthma in Childhood, Copenhagen University Hospital, Herlev-Gentofte, Gentofte, Denmark
- Department of Food Science, University of Copenhagen, Copenhagen, Denmark
| | - Jie Jiang
- Copenhagen Prospective Studies on Asthma in Childhood, Copenhagen University Hospital, Herlev-Gentofte, Gentofte, Denmark
- Department of Food Science, University of Copenhagen, Copenhagen, Denmark
| | - Shiraz A. Shah
- Copenhagen Prospective Studies on Asthma in Childhood, Copenhagen University Hospital, Herlev-Gentofte, Gentofte, Denmark
| | - Jakob Stokholm
- Copenhagen Prospective Studies on Asthma in Childhood, Copenhagen University Hospital, Herlev-Gentofte, Gentofte, Denmark
- Department of Food Science, University of Copenhagen, Copenhagen, Denmark
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10
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Boucard AS, Kulakauskas S, Alazzaz J, Chaouch S, Mammeri M, Millan-Oropeza A, Machado C, Henry C, Péchoux C, Richly H, Gassel M, Langella P, Polack B, Florent I, Bermúdez-Humarán LG. Isolation of derivatives from the food-grade probiotic Lactobacillus johnsonii CNCM I-4884 with enhanced anti- Giardia activity. Gut Microbes 2025; 17:2474149. [PMID: 40145272 PMCID: PMC11951713 DOI: 10.1080/19490976.2025.2474149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2024] [Revised: 01/03/2025] [Accepted: 02/25/2025] [Indexed: 03/28/2025] Open
Abstract
Giardiasis, a widespread intestinal parasitosis affecting humans and animals, is a growing concern due to the emergence of drug-resistant strains of G. intestinalis. Probiotics offer a promising alternative for preventing and treating giardiasis. Recent studies have shown that the probiotic Lactobacillus johnsonii CNCM I-4884 inhibits G. intestinalis growth both in vitro and in vivo. This protective effect is largely mediated by bile salt hydrolase (BSH) enzymes, which convert conjugated bile acids (BAs) into free forms that are toxic to the parasite. The objective of this study was to use adaptive evolution to develop stress-resistant derivatives of L. johnsonii CNCM I-4884, with the aim of improving its anti-Giardia activity. Twelve derivatives with enhanced resistance to BAs and reduced autolysis were generated. Among them, derivative M11 exhibited the highest in vitro anti-Giardia effect with enhanced BSH activity. Genomic and proteomic analyses of M11 revealed two SNPs and the upregulation of the global stress response by SigB, which likely contributed to its increased BAs resistance and BSH overproduction. Finally, the anti-Giardia efficacy of M11 was validated in a murine model of giardiasis. In conclusion, our results demonstrate that adaptive evolution is an effective strategy to generate robust food-grade bacteria with improved health benefits.
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Affiliation(s)
- Anne-Sophie Boucard
- Département Adaptation du Vivant, Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Saulius Kulakauskas
- Département Adaptation du Vivant, Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Jana Alazzaz
- UMR 7245, Muséum National d’Histoire Naturelle, Centre National de la Recherche Scientifique, Sorbonne Universités, Paris, France
| | - Soraya Chaouch
- UMR 7245, Muséum National d’Histoire Naturelle, Centre National de la Recherche Scientifique, Sorbonne Universités, Paris, France
| | - Mohamed Mammeri
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, Laboratoire de Santé Animale, Maisons-Alfort, France
| | - Aaron Millan-Oropeza
- Plateforme d’Analyse Protéomique Paris Sud-Ouest (PAPPSO), INRAE, MICALIS Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Carine Machado
- Plateforme d’Analyse Protéomique Paris Sud-Ouest (PAPPSO), INRAE, MICALIS Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Céline Henry
- Plateforme d’Analyse Protéomique Paris Sud-Ouest (PAPPSO), INRAE, MICALIS Institute, Université Paris-Saclay, Jouy-en-Josas, France
| | - Christine Péchoux
- Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas, France
| | - Holger Richly
- Boehringer Ingelheim Vetmedica GmbH, Kathrinenhof Research Center, Rohrdorf, Germany
| | - Michael Gassel
- Boehringer Ingelheim Vetmedica GmbH, Kathrinenhof Research Center, Rohrdorf, Germany
| | - Philippe Langella
- Département Adaptation du Vivant, Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
| | - Bruno Polack
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, Laboratoire de Santé Animale, Maisons-Alfort, France
| | - Isabelle Florent
- UMR 7245, Muséum National d’Histoire Naturelle, Centre National de la Recherche Scientifique, Sorbonne Universités, Paris, France
| | - Luis G. Bermúdez-Humarán
- Département Adaptation du Vivant, Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, Jouy-en-Josas, France
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11
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Jiang K, Pang X, Li W, Xu X, Yang Y, Shang C, Gao X. Interbacterial warfare in the human gut: insights from Bacteroidales' perspective. Gut Microbes 2025; 17:2473522. [PMID: 40038576 PMCID: PMC11901371 DOI: 10.1080/19490976.2025.2473522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2024] [Revised: 01/19/2025] [Accepted: 02/21/2025] [Indexed: 03/06/2025] Open
Abstract
Competition and cooperation are fundamental to the stability and evolution of ecological communities. The human gut microbiota, a dense and complex microbial ecosystem, plays a critical role in the host's health and disease, with competitive interactions being particularly significant. As a dominant and extensively studied group in the human gut, Bacteroidales serves as a successful model system for understanding these intricate dynamic processes. This review summarizes recent advances in our understanding of the intricate antagonism mechanisms among gut Bacteroidales at the biochemical or molecular-genetic levels, focusing on interference and exploitation competition. We also discuss unresolved questions and suggest strategies for studying the competitive mechanisms of Bacteroidales. The review presented here offers valuable insights into the molecular basis of bacterial antagonism in the human gut and may inform strategies for manipulating the microbiome to benefit human health.
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Affiliation(s)
- Kun Jiang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Xinxin Pang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Weixun Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Xiaoning Xu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Yan Yang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Chengbin Shang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Xiang Gao
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
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12
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Wu Y, Wen F, Gou S, Ran Q, Chu Y, Ma W, Zhao K. Multifaceted quorum-sensing inhibiting activity of 3-(Benzo[d][1,3]dioxol-4-yl)oxazolidin-2-one mitigates Pseudomonas aeruginosa virulence. Virulence 2025; 16:2479103. [PMID: 40104940 DOI: 10.1080/21505594.2025.2479103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 11/10/2024] [Accepted: 03/03/2025] [Indexed: 03/20/2025] Open
Abstract
As antibiotic resistance escalates into a global health crisis, novel therapeutic approaches against infectious diseases are in urgent need. Pseudomonas aeruginosa, an adaptable opportunistic pathogen, poses substantial challenges in treating a range of infections. The quorum-sensing (QS) system plays a pivotal role in orchestrating the production of a large set of virulence factors in a cell density-dependent manner, and the anti-virulence strategy targeting QS may show huge potential. Here, we present a comprehensive investigation into the potential of the synthesized compound 3-(benzo[d][1,3]dioxol-4-yl)oxazolidin-2-one (OZDO, C10H9NO4) as a QS inhibitor to curb the virulence of P. aeruginosa. By employing an integrated approach encompassing in silico screening, in vitro and in vivo functional identification, we elucidated the multifaceted effects of OZDO. Molecular docking predicted that OZDO interfered with three core regulatory proteins of P. aeruginosa QS system. Notably, OZDO exhibited significant inhibition on the production of pyocyanin, rhamnolipid and extracellular proteases, biofilm formation, and cell motilities of P. aeruginosa. Transcriptomic analysis and quantitative real-time PCR displayed the down-regulation of QS-controlled genes in OZDO-treated PAO1, reaffirming the QS-inhibition activity of OZDO. In vivo assessments using a Caenorhabditis elegans-infection model demonstrated OZDO mitigated P. aeruginosa pathogenicity, particularly against the hypervirulent strain PA14. Moreover, OZDO in combination with polymyxin B and aztreonam presented a promising avenue for innovative anti-infective therapy. Our study sheds light on the multifaceted potential of OZDO as an anti-virulence agent and its significance in combating P. aeruginosa-associated infections.
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Affiliation(s)
- Yi Wu
- Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu, Sichuan, China
| | - Fulong Wen
- Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu, Sichuan, China
| | - Shiyi Gou
- Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu, Sichuan, China
| | - Qiman Ran
- Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu, Sichuan, China
| | - Yiwen Chu
- Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu, Sichuan, China
| | - Wenbo Ma
- Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu, Sichuan, China
| | - Kelei Zhao
- Antibiotics Research and Re-Evaluation Key Laboratory of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu, Sichuan, China
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13
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Paduvari R, Somashekara DM. Advancements in genetic engineering for enhanced Polyhydroxyalkanoates (PHA) production: a comprehensive review of metabolic pathway manipulation and gene deletion strategies. Bioengineered 2025; 16:2458363. [PMID: 39882623 PMCID: PMC11784650 DOI: 10.1080/21655979.2025.2458363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2024] [Revised: 11/25/2024] [Accepted: 11/27/2024] [Indexed: 01/31/2025] Open
Abstract
Polyhydroxyalkanoates (PHA) are bioplastics produced by few bacteria as intracellular lipid inclusions under excess carbon source and nutrient-deprived conditions. These polymers are biodegradable and resemble petroleum-based plastics. The rising environmental concerns have increased the demand for PHA, but the low yield in wild-type bacterial strains limits large-scale production. An improvement in the PHA production can be achieved by genetically engineering the wild-type bacterial strains by removing competitive pathways that divert the metabolites away from PHA biosynthesis, cloning strong promotors to overexpress the genes involved in PHA biosynthesis and constructing non-native metabolic pathways that feed the metabolites for PHA production. The desired monomers in the PHA polymers were obtained by elimination of genes involved in PHA biosynthetic pathway. The chain length degradation specific-gene deletion of β-oxidation pathway resulted in the accumulation of PHA monomers having high carbon chain length. A controlled accumulation of monomers in the PHA polymer was achieved by constructing novel pathways in the bacteria and deleting native genes of competitive pathways from the genome of non-PHA producers. The present review attempts to showcase the novel genetic modification approaches conducted so far to enhance the PHA production with a special focus on metabolic pathway gene deletion in various bacteria.
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Affiliation(s)
- Raghavendra Paduvari
- Department of Biotechnology, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India
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14
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Naidovski N, Chong SKT, Liu F, Riordan SM, Wehrhahn MC, Yuwono C, Zhang L. Human macrophage response to the emerging enteric pathogen Aeromonas veronii: Inflammation, apoptosis, and downregulation of histones. Virulence 2025; 16:2440554. [PMID: 39663607 PMCID: PMC11702953 DOI: 10.1080/21505594.2024.2440554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2024] [Revised: 11/11/2024] [Accepted: 12/04/2024] [Indexed: 12/13/2024] Open
Abstract
This study investigated the pathogenic mechanisms of Aeromonas veronii in macrophages. THP-1 derived macrophages were used as a human macrophage model and were treated with A. veronii strain AS1 isolated from intestinal biopsies of an IBD patient, or Escherichia coli strain K-12. RNA was extracted and subjected to RNA sequencing and comparative transcriptomic analyses. Protein levels of IL-8, IL-1β, IL-18, and TNFα were measured using ELISA, and apoptosis was assessed using caspase 3/7 assays. Both A. veronii AS1 and E. coli K-12 significantly upregulated the expression of many genes involving inflammation. At the protein level, A. veronii AS1 induced significantly higher levels of IL-8, TNFα, mature IL-18 and IL-1β than E. coli K-12, and led to greater elevation of caspase 3/7 activities. Both A. veronii AS1 and E. coli K-12 upregulated the expression of CASP5, but not other caspase genes. A. veronii AS1 significantly downregulated the expression of 20 genes encoding histone proteins that E. coli K-12 did not. The more profound pathogenic effects of A. veronii in inducing inflammation and apoptosis in macrophages than E. coli K-12 are consistent with its role as a human enteric pathogen. The upregulated expression of CASP5 and increased release of IL-1β and IL-18 support the role of CASP5 in activation of non-canonical inflammasome. The downregulation of histone genes by A. veronii suggests a unique impact on host cell gene expression, which may represent a novel virulence strategy. These findings advance the understanding of pathogenic mechanisms of the emerging human enteric pathogen A. veronii.
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Affiliation(s)
- Nicholas Naidovski
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
| | - Sarah K. T. Chong
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
| | - Fang Liu
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
| | - Stephen M. Riordan
- Gastrointestinal and Liver Unit, Prince of Wales Hospital, University of New South Wales, Sydney, Australia
| | - Michael C. Wehrhahn
- Douglass Hanly Moir Pathology, a Sonic Healthcare Practice, Macquarie Park, NSW, Australia
| | - Christopher Yuwono
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
| | - Li Zhang
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, Australia
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15
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Yao N, Liu Y, Zhang ZY, Tian M, Xie WJ, Zhao H, Yang H, Rodewald LE, Wen N, Yin ZD, Wang FZ, Wang Q, Xu JW. Excretion and clearance of Sabin-like type 3 poliovirus in a child diagnosed with severe combined immunodeficiency. Hum Vaccin Immunother 2025; 21:2484882. [PMID: 40170570 PMCID: PMC11970734 DOI: 10.1080/21645515.2025.2484882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2025] [Revised: 03/06/2025] [Accepted: 03/22/2025] [Indexed: 04/03/2025] Open
Abstract
Children with primary immunodeficiency disorder (PID) are at higher risk of developing vaccine-associated paralytic poliomyelitis (VAPP) or vaccine-derived polioviruses (VDPV) infection when inadvertently expose to poliovirus vaccine, oral (OPV). A pilot study was initiated to describe the epidemiology of immunodeficiency-associated VDPV (iVDPV) and to estimate the risk of iVDPV shedding among individuals with PID. Children under 18 years of age newly diagnosed with PID were recruited for investigation and tested for poliovirus excretion. Children with poliovirus-positive stool samples had regular follow-up testing for poliovirus excretion and determination of clinical prognosis. A patient with severe combined immunodeficiency (SCID) with compound heterozygous mutations in the RAG1 gene was found to be excreting Sabin-like type 3 (SL3) poliovirus. Excretion stopped six weeks after hematopoietic stem-cell transplantation (HSCT). Graft versus host disease (GVHD) and poor graft function (PGF) occurred after HSCT, resulting in failure of hematopoiesis and immune system reconstitution. Given deficient innate and adaptive immunity, immune-mediated destruction of gastrointestinal (GI) tract caused by GVHD and inflammatory diarrheal illness of the girl may have contributed to her clearance of SL3 poliovirus. Intermittent surveillance of immune system parameters for iVDPV excreters receiving HSCT should be included in the PID surveillance program for further understanding poliovirus clearance mechanisms.
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Affiliation(s)
- Ning Yao
- Department of Expanded Immunization Program, Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
| | - Yang Liu
- Department of Expanded Immunization Program, Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
| | - Zhi-Yong Zhang
- Department of Rheumatology and Immunology, Children’s Hospital of Chongqing Medical University, Chongqing, China
- National Clinical Research Center for Child Health and Disorders, Chongqing, China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
- Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, China
| | - Min Tian
- Department of Rheumatology and Immunology, Children’s Hospital of Chongqing Medical University, Chongqing, China
- National Clinical Research Center for Child Health and Disorders, Chongqing, China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
- Chongqing Key Laboratory of Child Infection and Immunity, Chongqing, China
| | - Wu-Juan Xie
- Department of Expanded Immunization Program, Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
| | - Hua Zhao
- Department of Expanded Immunization Program, Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
| | - Hong Yang
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Lance E. Rodewald
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Ning Wen
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Zun-Dong Yin
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Fu-Zhen Wang
- National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Qing Wang
- Department of Expanded Immunization Program, Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
| | - Jia-Wei Xu
- Department of Expanded Immunization Program, Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
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16
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Wang R, Wang Y, Fu S, Liao S, Jiang T, Zhou B. Combining whole genome and transcriptome sequencing to analyze the pathogenic mechanism of Diplodia sapinea blight in Pinus sylvestris var. mongolica Litv. Virulence 2025; 16:2490216. [PMID: 40223234 PMCID: PMC12005458 DOI: 10.1080/21505594.2025.2490216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2024] [Revised: 02/16/2025] [Accepted: 04/02/2025] [Indexed: 04/15/2025] Open
Abstract
Diplodia sapinea (= Sphaeropsis sapinea) is an opportunistic pathogen that usually lives in symbiosis (the coexistence of dissimilar organisms) with its host and can cause disease under extreme climatic or physiological stress. In this study, we generated a high-quality genome map of D. sapinea using PacBio Circular Consensus Sequencing (CCS) technology and analysed the key disease-causing genes of D. sapinea by RNA sequencing (RNA-seq). In the study, a number of cell wall degrading enzyme genes were identified to be up-regulated during pathogen infection, which may be involved in biotic stress response in P. sylvestris var. mongolica Litv. It was also found that the expression of antioxidant-related genes, such as those involved in carotenoid biosynthesis, ascorbate and glutathione metabolism, was up-regulated in the P. s. var. mongolica Litv. after fungus infection. Differently expressed genes (DEGs) -based protein-protein interaction (PPI) network was constructed that included 163 pairs of significantly positively correlated proteins, forming three highly interacting gene clusters, and the PPI network was predicted to be associated with the replication and propagation processes of the fungus. These results provide important information for understanding the pathogenic mechanisms of Diplodia tip blight and developing control strategies in P. s. var. mongolica Litv.
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Affiliation(s)
- Ruiqi Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Yuting Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Sina Fu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Shixian Liao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Tingbo Jiang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Boru Zhou
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
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17
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Zhang X, Di Y, Zhang Y, Hu Y, Chi M, Kang J, Zheng Y, Wang H, Wang Y, Chen J, Zhang X. Hypermutability of Mycolicibacterium smegmatis due to ribonucleotide reductase-mediated oxidative homeostasis and imbalanced dNTP pools. Emerg Microbes Infect 2025; 14:2480698. [PMID: 40099407 PMCID: PMC11948356 DOI: 10.1080/22221751.2025.2480698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2024] [Revised: 02/09/2025] [Accepted: 03/12/2025] [Indexed: 03/19/2025]
Abstract
Ribonucleotide reductase (RNR) catalyzes the synthesis of four deoxyribonucleoside triphosphates (dNTPs), which are essential for DNA replication. Although dNTP imbalances reduce replication fidelity and elevate mutation rates, the impact of RNR dysfunction on Mycobacterium tuberculosis (Mtb) physiology and drug resistance remains unknown. Here, we constructed inducible knockdown strains for the RNR R1 subunit NrdE in Mtb and Mycolicibacterium smegmatis (Msm). NrdE knockdown significantly impaired growth and metabolic imbalances, indirectly disrupting oxidative homeostasis and mycolic acid synthesis, while increasing levels of intracellular ROS accumulation and enhancing cell wall permeability. Additionally, we developed genomic mutant strains, Msm-Y252A and Msm-Q255A, featuring targeted point mutations in the substrate-specific site (S-site) of the RNR loop domain, which determines NDP reduction specificity. The Msm-Y252A displayed a 1.9-fold decrease in dATP and increases in dGTP (1.6-fold), dTTP (9.0-fold), and dCTP (1.3-fold). In contrast, Msm-Q255A exhibited elevated intracellular levels of dGTP (1.6-fold), dTTP (6.1-fold), and dATP (1.5-fold), while dCTP levels remained unchanged. Neither the NrdE knockdown strain nor the S-site mutants exhibited direct resistance development; however, they both showed genomic instability, enhancing the emergence of rifampicin-resistant mutants, even with a 70-fold and a 25-fold increase in mutation frequency for Msm-Y252A and Msm-Q255A, respectively. This study demonstrates that NrdE is integral to Mycobacterium survival and genomic stability and that its RNR dysfunction creates a mutagenic environment under selective pressure, indirectly contributes to the development of drug resistance, positioning NrdE as an effective target for therapeutic strategies and a valuable molecular marker for early detection of drug-resistant Mtb.
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Affiliation(s)
- Xiao Zhang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, People’s Republic of China
| | - Yuchang Di
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, People’s Republic of China
| | - Yu Zhang
- Shanghai Sci-Tech Inno Center for Infection & Immunity, Shanghai, People’s Republic of China
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, National Medical Center for Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People’s Republic of China
| | - Youwei Hu
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, People’s Republic of China
| | - Mingzhe Chi
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, People’s Republic of China
| | - Jian Kang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, People’s Republic of China
| | - Yuqing Zheng
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, People’s Republic of China
| | - Hengyu Wang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, People’s Republic of China
| | - Yu Wang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, People’s Republic of China
| | - Jiazhen Chen
- Shanghai Sci-Tech Inno Center for Infection & Immunity, Shanghai, People’s Republic of China
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, National Medical Center for Infectious Diseases, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, People’s Republic of China
| | - Xuelian Zhang
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, People’s Republic of China
- Shanghai Sci-Tech Inno Center for Infection & Immunity, Shanghai, People’s Republic of China
- MOE Engineering Research Center of Gene Technology and Shanghai Engineering Research Center of Industrial Microorganism, Fudan University, Shanghai, People's Republic of China
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18
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Jin Q, Wang S, Yao Y, Jiang Q, Li K. The gut-eye axis: from brain neurodegenerative diseases to age-related macular degeneration. Neural Regen Res 2025; 20:2741-2757. [PMID: 39435619 PMCID: PMC11826455 DOI: 10.4103/nrr.nrr-d-24-00531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 07/25/2024] [Accepted: 09/21/2024] [Indexed: 10/23/2024] Open
Abstract
Age-related macular degeneration is a serious neurodegenerative disease of the retina that significantly impacts vision. Unfortunately, the specific pathogenesis remains unclear, and effective early treatment options are consequently lacking. The microbiome is defined as a large ecosystem of microorganisms living within and coexisting with a host. The intestinal microbiome undergoes dynamic changes owing to age, diet, genetics, and other factors. Such dysregulation of the intestinal flora can disrupt the microecological balance, resulting in immunological and metabolic dysfunction in the host, and affecting the development of many diseases. In recent decades, significant evidence has indicated that the intestinal flora also influences systems outside of the digestive tract, including the brain. Indeed, several studies have demonstrated the critical role of the gut-brain axis in the development of brain neurodegenerative diseases, including Alzheimer's disease and Parkinson's disease. Similarly, the role of the "gut-eye axis" has been confirmed to play a role in the pathogenesis of many ocular disorders. Moreover, age-related macular degeneration and many brain neurodegenerative diseases have been shown to share several risk factors and to exhibit comparable etiologies. As such, the intestinal flora may play an important role in age-related macular degeneration. Given the above context, the present review aims to clarify the gut-brain and gut-eye connections, assess the effect of intestinal flora and metabolites on age-related macular degeneration, and identify potential diagnostic markers and therapeutic strategies. Currently, direct research on the role of intestinal flora in age-related macular degeneration is still relatively limited, while studies focusing solely on intestinal flora are insufficient to fully elucidate its functional role in age-related macular degeneration. Organ-on-a-chip technology has shown promise in clarifying the gut-eye interactions, while integrating analysis of the intestinal flora with research on metabolites through metabolomics and other techniques is crucial for understanding their potential mechanisms.
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Affiliation(s)
- Qianzi Jin
- Department of Ophthalmology, The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Suyu Wang
- Department of Ophthalmology, The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Yujia Yao
- Department of Ophthalmology, The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Qin Jiang
- Department of Ophthalmology, The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Keran Li
- Department of Ophthalmology, The Affiliated Eye Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu Province, China
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19
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Chierichetti M, Cristofani R, Crippa V, Ferrari V, Cozzi M, Casarotto E, Pramaggiore P, Cornaggia L, Patelli G, Mohamed A, Piccolella M, Galbiati M, Rusmini P, Tedesco B, Poletti A. Small heat shock protein B8: from cell functions to its involvement in diseases and potential therapeutic applications. Neural Regen Res 2025; 20:2872-2886. [PMID: 39435632 PMCID: PMC11826450 DOI: 10.4103/nrr.nrr-d-24-00517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 08/05/2024] [Accepted: 08/29/2024] [Indexed: 10/23/2024] Open
Abstract
Heat shock protein family B (small) member 8 (HSPB8) is a 22 kDa ubiquitously expressed protein belonging to the family of small heat shock proteins. HSPB8 is involved in various cellular mechanisms mainly related to proteotoxic stress response and in other processes such as inflammation, cell division, and migration. HSPB8 binds misfolded clients to prevent their aggregation by assisting protein refolding or degradation through chaperone-assisted selective autophagy. In line with this function, the pro-degradative activity of HSPB8 has been found protective in several neurodegenerative and neuromuscular diseases characterized by protein misfolding and aggregation. In cancer, HSPB8 has a dual role being capable of exerting either a pro- or an anti-tumoral activity depending on the pathways and factors expressed by the model of cancer under investigation. Moreover, HSPB8 exerts a protective function in different diseases by modulating the inflammatory response, which characterizes not only neurodegenerative diseases, but also other chronic or acute conditions affecting the nervous system, such as multiple sclerosis and intracerebellar hemorrhage. Of note, HSPB8 modulation may represent a therapeutic approach in other neurological conditions that develop as a secondary consequence of other diseases. This is the case of cognitive impairment related to diabetes mellitus, in which HSPB8 exerts a protective activity by assuring mitochondrial homeostasis. This review aims to summarize the diverse and multiple functions of HSPB8 in different pathological conditions, focusing on the beneficial effects of its modulation. Drug-based and alternative therapeutic approaches targeting HSPB8 and its regulated pathways will be discussed, emphasizing how new strategies for cell and tissue-specific delivery represent an avenue to advance in disease treatments.
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Affiliation(s)
- Marta Chierichetti
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Riccardo Cristofani
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Valeria Crippa
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Veronica Ferrari
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Marta Cozzi
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Elena Casarotto
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Paola Pramaggiore
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Laura Cornaggia
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Guglielmo Patelli
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Ali Mohamed
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Margherita Piccolella
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Mariarita Galbiati
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Paola Rusmini
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Barbara Tedesco
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
| | - Angelo Poletti
- Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari “Rodolfo Paoletti” (DiSFeB), Università degli Studi di Milano, Milan, Italy
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20
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Wei Y, Chen Y, Lin X, Zhang S, Zhu B, Ji C. Integrated transcriptome and proteome analysis unveils black tea polyphenols metabolic pathways in Saccharomyces cerevisiae. Food Microbiol 2025; 130:104777. [PMID: 40210400 DOI: 10.1016/j.fm.2025.104777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2024] [Revised: 02/28/2025] [Accepted: 03/09/2025] [Indexed: 04/12/2025]
Abstract
Kombucha is a fermented beverage produced through the fermentation of sweetened tea by a symbiotic community of bacteria and yeasts (SCOBY). Microbial fermentation in kombucha increases low-molecular-weight polyphenols contents, effectively improving the bioavailability and antioxidant properties. However, the biotransformation pathways of polymerized polyphenols remain poorly understood. This study combines polyphenol dynamics with transcriptomic and proteomic analyses to elucidate the metabolic pathways in Saccharomyces cerevisiae, a yeast frequently found in kombucha, during black tea broth fermentation. Firstly, profiles of polyphenols, particularly catechins were analyzed and key points of polyphenol changes kinetics were identified, then transcriptome and proteome of S. cerevisiae were examined. The overall omics data profile indicated the reduction in protein synthesis in S. cerevisiae, reflecting a shift in resource allocation, with energy focused more on metabolic activities rather than on growth. Specifically, enzymes related to biotransformation of polymerized polyphenols and hydrolyzing of glycoside polyphenols were extracted. For polymeric polyphenols, the upregulation of peroxidases (CCP1) and multicopper oxidases (FET3) suggests their role in the degradation of organic aromatic compounds. They also showed a strong correlation with catechin changes. Additionally, S. cerevisiae enzymes like monooxygenase (COQ6) likely contribute to the reductive cleavage of the O1-C2 bond in the C-ring of flavan-3-ols. Enzymes such as NADPH dehydrogenase 3 (OYE3) may be involved in catechin degradation in the later stages of fermentation. In addition, glycoside hydrolases, involved in breaking glycosidic bonds in polyphenol glycosides, were also identified. Based on these findings, the tea polyphenol biotransformation pathways in S. cerevisiae were mapped. This research provides a foundation for uncovering polyphenol metabolism pathways in starter cultures, designing new cultures to achieve predictable polyphenol profiles in kombucha, and enhancing its health benefits.
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Affiliation(s)
- Yanjun Wei
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian, Liaoning, 116034, China.
| | - Yingxi Chen
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian, Liaoning, 116034, China.
| | - Xinping Lin
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian, Liaoning, 116034, China.
| | - Sufang Zhang
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian, Liaoning, 116034, China.
| | - Beiwei Zhu
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian, Liaoning, 116034, China.
| | - Chaofan Ji
- SKL of Marine Food Processing & Safety Control, School of Food Science and Technology, Dalian Polytechnic University, Dalian, Liaoning, 116034, China.
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21
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Liu C, Yi F, Niu C, Li Q. Unravelling microbial interactions in a synthetic broad bean paste microbial community. Food Microbiol 2025; 130:104767. [PMID: 40210396 DOI: 10.1016/j.fm.2025.104767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2024] [Revised: 12/12/2024] [Accepted: 03/04/2025] [Indexed: 04/12/2025]
Abstract
The biotic factors governing the assembly and functionality of broad bean paste microbiota remain largely unexplored due to its highly complex fermentation ecosystem. This study constructed a synthetic community comprising Zygosaccharomyces rouxii, Staphylococcus carnosus, Bacillus subtilis, Bacillus amyloliquefaciens, Tetragenococcus halophilus and Weissella confusa, representing key microorganisms involved in broad bean paste fermentation. The generalized Lotka-Volterra (gLV) model revealed that the microbial interaction network among the six species was dominated by pairwise interactions. The abundances of most species in the multi-species communities at 2 and 4 days were accurately predicted using the gLV model, based on pairwise species combinations outcomes. Among pairwise interactions, negative interactions (57 %) were significantly more prevalent than positive interactions (37 %), with the former generally being stronger. Subsequent investigations demonstrated that the tested Z. rouxii inhibited acid accumulation by acid-producing bacteria, while the two strains belonging to the genus Bacillus stimulated lactic acid bacteria growth and lactic acid accumulation. The sequential inoculation strategy, informed by the interaction network, enhanced the synthetic community's bioaugmentation in broad bean paste, significantly improving ester and mellow flavors, reducing unpleasant odors, and increasing volatile flavor substances to 9.43 times that of natural fermentation. Overall, this study revealed the interaction network of six key microorganisms in broad bean paste using the gLV model and guided the application of the synthetic community in its fermentation, significantly enhancing flavor quality.
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Affiliation(s)
- Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.
| | - Feng Yi
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
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22
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Khandelwal H, Mutyala S, Kim M, Kong DS, Kim JR. Whole-cell redox biosensor for triclosan detection: Integrating spectrophotometric and electrochemical detection. Bioelectrochemistry 2025; 164:108921. [PMID: 39904301 DOI: 10.1016/j.bioelechem.2025.108921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2024] [Revised: 01/24/2025] [Accepted: 01/27/2025] [Indexed: 02/06/2025]
Abstract
Organic pollutants like bisphenol, acetaminophen, and triclosan, widely used in healthcare products, pose environmental risks and act as endocrine disruptors. These pollutants can alter the intracellular redox balance, making engineered whole-cell redox biosensors valuable for their detection. This study utilized the SoxRS regulatory system in bacteria, which responds to oxidative stress through NADP+/NADPH levels by modulating gene expression of SoxS through the SoxS promoter (pSoxS). A plasmid containing SoxR-pSoxS and the LacZ reporter gene was constructed and introduced into E. coli BL21 (ΔLacZ SoxRS+). The LacZ gene enabled dual detection using O-nitrophenyl-β-galactopyranoside (ONPG) for spectrophotometric detection or p-aminophenyl β-D-galactopyranoside (PAPG) for electrochemical detection. The whole-cell pRUSL12 redox biosensor was activated by redox inducers such as pyocyanin and methyl viologen, measurable via β-galactosidase assays. Among pollutants tested, triclosan specifically repressed SoxR:pSoxS::lacZ activity in the presence of pyocyanin or methyl viologen. Optimization identified pyocyanin as the more effective inducer for triclosan detection, with the biosensor capable of detecting triclosan in the 100-400 µg/L range. These redox-based biosensors offer a powerful tool for monitoring metabolic redox changes and identifying specific organic pollutants in the environment.
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Affiliation(s)
- Himanshu Khandelwal
- School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Sakuntala Mutyala
- School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Minsoo Kim
- School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Da Seul Kong
- School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Jung Rae Kim
- School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea; Institute for Environmental Energy, Pusan National University, Busan 46241, Republic of Korea.
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23
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Muñoz Sandoval D, Bach FA, Ivens A, Harding AC, Smith NL, Mazurczyk M, Themistocleous Y, Edwards NJ, Silk SE, Barrett JR, Cowan GJ, Napolitani G, Savill NJ, Draper SJ, Minassian AM, Nahrendorf W, Spence PJ. Plasmodium falciparum infection induces T cell tolerance that is associated with decreased disease severity upon re-infection. J Exp Med 2025; 222:e20241667. [PMID: 40214640 PMCID: PMC11987708 DOI: 10.1084/jem.20241667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2024] [Revised: 11/18/2024] [Accepted: 03/12/2025] [Indexed: 04/14/2025] Open
Abstract
Immunity to severe malaria is acquired quickly, operates independently of pathogen load, and represents a highly effective form of disease tolerance. The mechanism that underpins tolerance remains unknown. We used a human rechallenge model of falciparum malaria in which healthy adult volunteers were infected three times over a 12 mo period to track the development of disease tolerance in real-time. We found that parasitemia triggered a hardwired innate immune response that led to systemic inflammation, pyrexia, and hallmark symptoms of clinical malaria across the first three infections of life. In contrast, a single infection was sufficient to reprogram T cell activation and reduce the number and diversity of effector cells upon rechallenge. Crucially, this did not silence stem-like memory cells but instead prevented the generation of cytotoxic effectors associated with autoinflammatory disease. Tolerized hosts were thus able to prevent collateral tissue damage in the absence of antiparasite immunity.
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Affiliation(s)
- Diana Muñoz Sandoval
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
- Instituto de Microbiologia, Universidad San Francisco de Quito, Quito, Ecuador
| | - Florian A. Bach
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
| | - Alasdair Ivens
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
| | - Adam C. Harding
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
| | - Natasha L. Smith
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
| | - Michalina Mazurczyk
- Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | | | | | - Sarah E. Silk
- The Jenner Institute, University of Oxford, Oxford, UK
- Department of Biochemistry and Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
| | - Jordan R. Barrett
- The Jenner Institute, University of Oxford, Oxford, UK
- Department of Biochemistry and Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
| | - Graeme J.M. Cowan
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
| | - Giorgio Napolitani
- Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Nicholas J. Savill
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
| | - Simon J. Draper
- The Jenner Institute, University of Oxford, Oxford, UK
- Department of Biochemistry and Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
- NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Angela M. Minassian
- The Jenner Institute, University of Oxford, Oxford, UK
- Department of Biochemistry and Kavli Institute for Nanoscience Discovery, University of Oxford, Oxford, UK
- NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Wiebke Nahrendorf
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
| | - Philip J. Spence
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
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24
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Cai X, Zheng S, Wang X, Wang S, Guo M. An unconventional effector MoRpa12 targeting host nuclei is essential for the development and pathogenicity of Magnaporthe oryzae. Microbiol Res 2025; 296:128125. [PMID: 40056712 DOI: 10.1016/j.micres.2025.128125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2025] [Revised: 02/18/2025] [Accepted: 02/25/2025] [Indexed: 03/10/2025]
Abstract
RNA polymerase I (Pol I) is a multi-subunit protein complex associated with the transcription of most ribosomal RNA molecules in all eukaryotes. Rpa12 is a small subunit of the Pol I catalytic core and plays a critical role in RNA cleavage, transcription initiation and elongation during proliferation in yeast and mammals. However, the function of Rpa12 in phytopathogenic fungi has not yet been characterized. Here, we present the functional characterization of MoRpa12, a homologue of the yeast Rpa12, in Magnaporthe oryzae. MoRpa12 shows upregulation during the infection phase, and MoRpa12-GFP exhibits nuclear localization at different developmental stages of M. oryzae and translocates into the nuclei of plant cells after fungal penetration. The MoRpa12 mutants also exhibit significant defects on mitosis, autophagy, oxidative stress tolerance, cell wall integrity, septin ring assembly, lipid and glycogen metabolism, and pathogenicity. The four cysteine residues at the amino terminus of this protein are critical for the nuclear localization of MoRpa12, and their site-directed mutagenesis affects the localization, fungal invasion, and full virulence of M. oryzae. In conclusion, our findings indicate that MoRpa12 functions as an unconventional secreted effector targeting host nuclei and is essential for the fungal growth and plant infection of M. oryzae.
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Affiliation(s)
- Xiaoyan Cai
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Hefei 230036, PR China; College of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Shengjie Zheng
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Hefei 230036, PR China; College of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Xiuting Wang
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Hefei 230036, PR China; College of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Shuaishuai Wang
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Hefei 230036, PR China; College of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Min Guo
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Hefei 230036, PR China; College of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China.
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25
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Zhao G, Zhang D, Tang Y, Hu X, Wang X. Recent advances on engineering Escherichia coli and Corynebacterium glutamicum for efficient production of L-threonine and its derivatives. Metab Eng 2025; 90:1-15. [PMID: 40020772 DOI: 10.1016/j.ymben.2025.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2024] [Revised: 01/31/2025] [Accepted: 02/23/2025] [Indexed: 03/03/2025]
Abstract
L-threonine, one of the three major amino acids, plays a vital role in various industries such as food, feed, pharmaceuticals, and cosmetics. Currently, the fermentation-based production of L-threonine has evolved into an efficient, cost-effective, and environmentally friendly industrial process. Escherichia coli and Corynebacterium glutamicum, as the industrial workhorses of amino acids production, have long been widely studied due to their well-established genetic backgrounds and powerful molecular tools. This review focuses on recent advances in the microbial production of L-threonine by metabolic engineering. From three key modules, including L-threonine synthesis module, central metabolism module and global regulation module, we provide a comprehensive analysis on the entire metabolic pathway of L-threonine and the global regulation of the production process. Furthermore, we systematically summarize biotransformation methods for producing high-value derivatives of L-threonine, thereby broadening the application scope and market potential of L-threonine. Overall, this review shows many effective strategies for the biosynthesis of L-threonine, and offers guidance for the microbial production of L-aspartate family amino acids and their derivatives.
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Affiliation(s)
- Guihong Zhao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Dezhi Zhang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Yaqun Tang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Xiaoqing Hu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Xiaoyuan Wang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China.
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26
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Zhang YX, Gao JY, Wang MM, Qi WD, Chen QY, Wang YH, Cai WF, Guo K. Enrichment of nitrogen-fixing hydrogen-oxidizing bacteria community for efficient microbial protein production in airlift reactor. BIORESOURCE TECHNOLOGY 2025; 428:132443. [PMID: 40139468 DOI: 10.1016/j.biortech.2025.132443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2025] [Revised: 03/21/2025] [Accepted: 03/22/2025] [Indexed: 03/29/2025]
Abstract
Autotrophic nitrogen-fixing hydrogen-oxidizing bacteria (NF-HOB) have the capability to directly utilize carbon dioxide and dinitrogen for the sustainable production of microbial protein (MP), offering a promising alternative for food and feed applications. However, the low production rate of MP remains a major bottleneck for the practical implementation of NF-HOB. This study enriched a highly active and stable NF-HOB functional community for enhanced MP production. Utilizing an airlift reactor and implementing a two-stage gas supply strategy achieved a maximum cell dry weight (CDW) of 4.8 g/L and a biomass yield of 0.25 g CDW/L/day, surpassing previously reported values. The produced MP exhibited an essential amino acid profile superior to soybean meal and comparable to fish meal, with a notable accumulation of branched-chain amino acids (BCAAs). These findings provide new insights into NF-HOB enrichment strategies and further highlight their potential as a sustainable platform for MP production.
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Affiliation(s)
- Yu-Xiao Zhang
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jia-Yao Gao
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Meng-Meng Wang
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Wei-Dong Qi
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Qing-Yun Chen
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yun-Hai Wang
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Wen-Fang Cai
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Kun Guo
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
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27
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Olsen WP, Larsen AKK, Christensen JL, Malle MG, Otzen DE. Investigating strategies for creating cross-linked amyloid fibril networks through branching of amyloid growth. Colloids Surf B Biointerfaces 2025; 251:114617. [PMID: 40068237 DOI: 10.1016/j.colsurfb.2025.114617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2025] [Revised: 02/18/2025] [Accepted: 03/04/2025] [Indexed: 04/15/2025]
Abstract
Hydrogel biomaterials have been extensively explored for applications in medicine, materials science, and the development of functionalized materials. Traditionally, hydrogels were produced using simple polymers, but advancements over recent decades have enabled the use of biological materials such as proteins, peptides, polysaccharides, and even amyloid fibrils. Among these, amyloid-based hydrogels have demonstrated unique advantages, including enhanced cell adhesion and differentiation. Furthermore, they can be engineered as living materials using bacteria capable of producing and repairing the hydrogel in situ. Here we investigate novel strategies for controlling amyloid fibrillation using the functional amyloid CsgA. We designed fusion proteins combining two CsgA moieties to explore methods for creating branched fibril networks. Our approach utilized two distinct strategies: passive and active branching. The passive strategy involved direct fusion of two CsgA moieties separated by a designed alpha-helical linker and engineered to integrate into fibrils without external intervention. The active branching approach incorporated a redox-sensitive CsgA variant containing an internal disulfide bridge that blocks fibrillation until reduced. This design allows for precise control of amyloid fibrillation in the active variants. We analyzed these constructs qualitatively approach using a combination of transmission electron microscopy (TEM), real-time atomic force microscopy (AFM), and total internal reflection fluorescence (TIRF) microscopy, supported by quantitative image analysis. While we did not observe direct evidence of fibril branching, our modifications led to significant changes in fibrillation behavior. Notably, TIRF imaging revealed a marked increase in high-density fibril regions following the activation of our engineered constructs, indicating the potential for controlled assembly of higher-order structures. These findings provide new insights into controlling amyloid fibrillation and suggest alternative strategies for manipulating fibril organization. The observed ability to alter local fibril density through chemical triggers offers promising directions for developing responsive biomaterials. We propose refinements for future design and suggest new directions to optimize amyloid-based hydrogels for next-generation biomaterial applications.
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Affiliation(s)
- William P Olsen
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus C 8000, Denmark; Sino-Danish College (SDC), University of Chinese Academy of Sciences, Beijing, China
| | - Anne-Kathrine K Larsen
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus C 8000, Denmark; Sino-Danish College (SDC), University of Chinese Academy of Sciences, Beijing, China
| | - Jakob L Christensen
- Department of Applied Mathematics and Computer Science, DTU Compute, DTU Technical University of Denmark, Lyngby, Denmark
| | - Mette G Malle
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus C 8000, Denmark
| | - Daniel E Otzen
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus C 8000, Denmark.
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28
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Li J, Wang J, Wu J, Wang X. Bacillus subtilisbiofilm expansion mediated by the interaction between matrix-producing cells formed "Van Gogh bundles" and other phenotypic cells. Colloids Surf B Biointerfaces 2025; 251:114611. [PMID: 40081257 DOI: 10.1016/j.colsurfb.2025.114611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2024] [Revised: 01/25/2025] [Accepted: 03/04/2025] [Indexed: 03/15/2025]
Abstract
During the expansion of Bacillus subtilis biofilm on a solid MSgg substrate, cells within the biofilm form highly organized structures through interactions, growth and differentiation. This organized structure evolves from an initial single chain to bundles known as "Van Gogh bundles," which guild the biofilm' expansion. In this paper, we present a model for biofilm growth based on cell interaction forces. In this model, cell interactions within Van Gogh bundles are represented by spring connections, and the interactions between Van Gogh bundles and other phenotypic cells are confined to a specific region (repulsive inside the region, attractive outside it). In a single-biofilm system, as nutrients are depleted, increasing numbers of motile cells transform into matrix-producing cells, forming Van Gogh bundles that guide the biofilm expansion towards areas with higher nutrient concentrations, thereby enhancing its expansion ability. In a muti-biofilm system, extreme nutrient depletion leads to the transformation of matrix-producing cells into spores, which affects the number and folding characteristics of Van Gogh bundles, thereby influencing the biofilm expansion. Our study illustrates how the simple organization of cells within a community can provide a significant ecological advantage.
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Affiliation(s)
- Jin Li
- School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China.
| | - Jiankun Wang
- School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jin Wu
- School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiaoling Wang
- School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China; School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
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29
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Poehlein A, Zeldes B, Flaiz M, Böer T, Lüschen A, Höfele F, Baur KS, Molitor B, Kröly C, Wang M, Zhang Q, Fan Y, Chao W, Daniel R, Li F, Basen M, Müller V, Angenent LT, Sousa DZ, Bengelsdorf FR. Advanced aspects of acetogens. BIORESOURCE TECHNOLOGY 2025; 427:131913. [PMID: 39626805 DOI: 10.1016/j.biortech.2024.131913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 11/28/2024] [Accepted: 11/28/2024] [Indexed: 03/21/2025]
Abstract
Acetogens are a diverse group of anaerobic bacteria that are capable of carbon dioxide reduction and have for long fascinated scientists due to their unique metabolic prowess. Historically, acetogens have been recognized for their remarkable ability to grow and to produce acetate from different one-carbon sources, including carbon dioxide, carbon monoxide, formate, methanol, and methylated organic compounds. The key metabolic pathway in acetogens responsible for converting these one-carbon sources is the Wood-Ljungdahl pathway. This review offers a comprehensive overview of the latest discoveries that are related to acetogens. It delves into a variety of topics, including newly isolated acetogens, their taxonomy and physiology and highlights novel metabolic properties. Additionally, it explores metabolic engineering strategies that are designed to expand the product range of acetogens or to understand specific traits of their metabolism. Lastly, the review presents innovative gas fermentation techniques within the context of industrial applications.
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Affiliation(s)
- Anja Poehlein
- Genomic and Applied Microbiology & Göttingen Genomics Laboratory, Georg-August University, Göttingen, Germany
| | - Benjamin Zeldes
- Microbiology, Institute of Biological Sciences, University of Rostock, Rostock, Germany
| | - Maximilian Flaiz
- Laboratory of Microbiology, Wageningen University and Research, Wageningen 6708 WE, the Netherlands
| | - Tim Böer
- Genomic and Applied Microbiology & Göttingen Genomics Laboratory, Georg-August University, Göttingen, Germany
| | - Alina Lüschen
- Genomic and Applied Microbiology & Göttingen Genomics Laboratory, Georg-August University, Göttingen, Germany
| | - Franziska Höfele
- Institute of Molecular Biology and Biotechnology of Prokaryotes, University of Ulm, Ulm, Germany
| | - Kira S Baur
- Institute of Molecular Biology and Biotechnology of Prokaryotes, University of Ulm, Ulm, Germany
| | - Bastian Molitor
- Environmental Biotechnology Group, Department of Geosciences, University of Tübingen, Schnarrenbergstraße 94-96, Tübingen 72076, Germany; Cluster of Excellence - Controlling Microbes to Fight Infections, University of Tübingen, Auf der Morgenstelle 28, Tübingen 72074, Germany
| | - Christian Kröly
- Laboratory of Microbiology, Wageningen University and Research, Wageningen 6708 WE, the Netherlands; Institute of Molecular Biology and Biotechnology of Prokaryotes, University of Ulm, Ulm, Germany
| | - Meng Wang
- SINOPEC Dalian Research Institute of Petroleum and Petrochemical Co. Ltd, China
| | - Quan Zhang
- SINOPEC Dalian Research Institute of Petroleum and Petrochemical Co. Ltd, China.
| | - Yixuan Fan
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, China
| | - Wei Chao
- Beijing Shougang LanzaTech Technology Co. Ltd, Tianshunzhuang North Road, Shijingshan District, Beijing, China
| | - Rolf Daniel
- Genomic and Applied Microbiology & Göttingen Genomics Laboratory, Georg-August University, Göttingen, Germany
| | - Fuli Li
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, China
| | - Mirko Basen
- Microbiology, Institute of Biological Sciences, University of Rostock, Rostock, Germany
| | - Volker Müller
- Department of Molecular Microbiology & Bioenergetics, Institute of Molecular Biosciences, Goethe-University Frankfurt am Main, Frankfurt am Main, Germany
| | - Largus T Angenent
- Environmental Biotechnology Group, Department of Geosciences, University of Tübingen, Schnarrenbergstraße 94-96, Tübingen 72076, Germany
| | - Diana Z Sousa
- Laboratory of Microbiology, Wageningen University and Research, Wageningen 6708 WE, the Netherlands
| | - Frank R Bengelsdorf
- Institute of Molecular Biology and Biotechnology of Prokaryotes, University of Ulm, Ulm, Germany.
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He H, Jer NW, Hu Q, Zhang Z, Sun S, Xu G, Yang S, Zheng S, Wu F, Wu Q, Chen GQ. Engineering Halomonas bluephagenesis for pilot production of terpolymers containing 3-hydroxybutyrate, 4-hydroxybutyrate and 3-hydroxyvalerate from glucose. Metab Eng 2025; 90:117-128. [PMID: 40081465 DOI: 10.1016/j.ymben.2025.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2024] [Revised: 02/11/2025] [Accepted: 03/04/2025] [Indexed: 03/16/2025]
Abstract
Microbial poly(3-hydroxybutyrate-co-4-hydroxybutyrate-co-3-hydroxyvalerate), abbreviated as P(3HB-4HB-3HV) or P34HBHV, is a flexible polyhydroxyalkanoate (PHA) material ranging from softness to elasticity depending on the ratios of various monomers. Halomonas bluephagenesis, as the chassis of the next generation industrial biotechnology (NGIB) able to grow contamination free under open unsterile conditions. The resulting recombinants of H. bluephagenesis became capable of efficiently synthesizing P34HBHV utilizing glucose as the sole carbon source. Engineered H. bluephagenesis H1 (encoding ogdA, sucD, 4hbD, orfZ, scpA and scpB in chromosomes) transformed with a plasmid containing PHA synthesis genes phaC and phaA and its derivative H29 produced up to 92 % P(3HB-co-8.85 %4HB-co-8.47 %3HV) and 72 % P(3HB-co-13.21 %4HB-co-11.97 %3HV) in cell dry weight (CDW), respectively, in shake flasks. In bioreactor cultivation, H. bluephagenesis H39 constructed by integrating the 4hbD, phaC and phaA genes into the genome of H. bluephagenesis H1 achieved 95 g/L CDW with 69 % P(3HB-co-10.49 %4HB-co-3.54 %3HV), while H. bluephagenesis H43, further optimized with lpxM deletion, reached 73 g/L CDW with 78 % P(3HB-co-10.35 %4HB-co-4.54 %3HV) in a 100 L bioreactor. For the first time, H. bluephagenesis was successfully engineered to generate stable and hyperproductive derivative strains for pilot production of P(3HB-4HB-3HV) with customizable monomer ratios from glucose as the sole carbon source.
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Affiliation(s)
- Hongtao He
- School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Ng Wuh Jer
- PhaBuilder Biotech Co. Ltd., Shunyi District, Zhaoquan Ying, Beijing, 101309, China
| | - Qitiao Hu
- School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Zhongnan Zhang
- School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Simian Sun
- School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Geyuan Xu
- School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Shimao Yang
- School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Shuang Zheng
- School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Fuqing Wu
- School of Life Sciences, Tsinghua University, Beijing, 100084, China.
| | - Qiong Wu
- School of Life Sciences, Tsinghua University, Beijing, 100084, China.
| | - Guo-Qiang Chen
- School of Life Sciences, Tsinghua University, Beijing, 100084, China; Center for Synthetic and Systems Biology, Tsinghua University, Beijing, 100084, China; Tsinghua-Peking Center for Life Sciences, Beijing, China; MOE Key Lab of Industrial Biocatalysis, Dept Chemical Engineering, Tsinghua University, Beijing, 100084, China.
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31
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Liang G, Gao C, Wu J, Hu G, Li X, Liu L. Enhancing electron transfer efficiency in microbial electrochemical systems for bioelectricity and chemical production. BIORESOURCE TECHNOLOGY 2025; 428:132445. [PMID: 40147568 DOI: 10.1016/j.biortech.2025.132445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2024] [Revised: 03/23/2025] [Accepted: 03/23/2025] [Indexed: 03/29/2025]
Abstract
Microbial electrochemical systems have emerged as promising platforms for chemical production and bioelectricity generation by utilizing cost-effective substrates. However, their performance is limited by the efficiency of both intracellular and extracellular electron transfer. This review systematically summarizes strategies to enhance electron transfer from a microbial perspective, including improvements in extracellular electron transfer, intracellular electron regeneration, and the establishment of electroactive microbial consortia. In addition, the working mechanisms and limitations of these strategies are analyzed. Furthermore, the potential applications of microbial electrochemical systems in bioelectricity production, chemical synthesis, and industrial-scale applications are explored. Finally, the current challenges of microbial electrochemical systems are discussed, and potential solutions are proposed to advance their practical applications.
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Affiliation(s)
- Guangjie Liang
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Cong Gao
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China.
| | - Jing Wu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China.
| | - Guipeng Hu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China.
| | - Xiaomin Li
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China.
| | - Liming Liu
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China.
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32
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Li L, Xiao T, He Z, Chen Q. Concentration-dependent effects of polystyrene microplastics on methanogenic activity and microbial community shifts in sewer sediment. BIORESOURCE TECHNOLOGY 2025; 428:132464. [PMID: 40158865 DOI: 10.1016/j.biortech.2025.132464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2024] [Revised: 03/27/2025] [Accepted: 03/27/2025] [Indexed: 04/02/2025]
Abstract
Microplastics (MPs) are emerging environmental contaminants that interfere with microbial processes, yet their effects on methanogenesis in anaerobic systems remain insufficiently understood. This study investigates the impact of polystyrene microplastics (PS-MPs) on methanogenesis, microbial community structure, and metabolic pathways in simulated sewer sediment systems, with exposure concentrations of 5, 50, and 250 mg·L-1. The results revealed a concentration-dependent effect of PS-MPs on methanogenesis: a 222.2 % increase at 5 mg·L-1, and 72.2 % and 88.9 % increases at 50 mg·L-1 and 250 mg·L-1, respectively, indicating a non-linear response. PS-MPs exposure enhanced coenzyme F420 (F420) activity, a key indicator of methanogenic activity, but also inhibited methyl coenzyme M reductase (Mcr), disrupting critical methanogenic pathways. At lower concentrations, PS-MPs promoted the abundance of hydrogenotrophic methanogens, whereas higher concentrations suppressed overall methanogenic activity. Furthermore, PS-MPs had a dose-dependent effect on CH4 oxidation, influencing the structure of methanotrophic communities. These findings establish a clear dose-response relationship between PS-MPs concentration and CH4 dynamics in anaerobic systems, highlighting the complex role of microplastics in methanogenesis and microbial interactions. This research provides valuable insights into the environmental implications of microplastics in wastewater systems and their potential impacts on biogas production and CH4 mitigation, aligning with the objectives of environmental bioengineering and sustainable waste management.
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Affiliation(s)
- Lucheng Li
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China.
| | - Ting Xiao
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Zanji He
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Qijin Chen
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing 210044, China
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Monika P, Krishna RH, Hussain Z, Nandhini K, Pandurangi SJ, Malek T, Kumar SG. Antimicrobial hybrid coatings: A review on applications of nano ZnO based materials for biomedical applications. BIOMATERIALS ADVANCES 2025; 172:214246. [PMID: 40037050 DOI: 10.1016/j.bioadv.2025.214246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2024] [Revised: 02/14/2025] [Accepted: 02/24/2025] [Indexed: 03/06/2025]
Abstract
The extreme survivability of infectious microorganisms on various surfaces prompts for the risk of disease transmissions, posing a perilous concern for global health. Thus, the treatment of these pathogenic microorganisms using the nanomaterials functionalized with antimicrobial coatings reaps relevant scope in the ongoing trend of research. Driven by their admirable biocompatibility, cost-effectiveness, and minimal toxicity, ZnO nanoparticles (ZnO-NPs) based antimicrobial hybrid coatings have emerged as a robust material to prevent the growth of infectious microorganisms on various surfaces, which in turn boosted their applications in the area of biomedical sciences. In this context, the current review focuses on the synthesis of ZnO-NPs based hybrid coatings using different polymers and inorganic materials for effective utilization in biomedical domains including dentistry, orthopedics, implantable medical devices and wound healing. The synergistic effect of ZnO-NPs hybrids with remarkable antibacterial, antifungal and antiviral property has been discussed. Finally, we highlight the future potential of ZnO-NPs based antimicrobial hybrid coatings for potential clinical translation.
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Affiliation(s)
- Prakash Monika
- Department of Biotechnology, M.S. Ramaiah Institute of Technology, MSR Nagar, MSRIT Post, Bangalore 560054, India.
| | - R Hari Krishna
- Department of Chemistry, M.S. Ramaiah Institute of Technology, MSR Nagar, MSRIT Post, Bangalore 560054, India; Centre for Bio and Energy Materials Innovation, M.S. Ramaiah Institute of Technology, MSR Nagar, MSRIT Post, Bangalore 560054, India.
| | - Zayaan Hussain
- Department of Biotechnology, M.S. Ramaiah Institute of Technology, MSR Nagar, MSRIT Post, Bangalore 560054, India
| | - Krithika Nandhini
- Department of Biotechnology, M.S. Ramaiah Institute of Technology, MSR Nagar, MSRIT Post, Bangalore 560054, India
| | - Samhitha J Pandurangi
- Department of Biotechnology, M.S. Ramaiah Institute of Technology, MSR Nagar, MSRIT Post, Bangalore 560054, India
| | - Tausif Malek
- Department of Biotechnology, M.S. Ramaiah Institute of Technology, MSR Nagar, MSRIT Post, Bangalore 560054, India
| | - S Girish Kumar
- Department of Chemistry and Centre for Nanomaterials and Devices, RV College of Engineering, Bangalore 560059, India.
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Zhang J, Li W, Wang X, Zhang X, Guo X, Bai C, Lv L. Removal of antibiotic resistance genes by Cl 2-UV process: Direct UV damage outweighs free radicals in effectiveness. JOURNAL OF HAZARDOUS MATERIALS 2025; 490:137834. [PMID: 40048777 DOI: 10.1016/j.jhazmat.2025.137834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2024] [Revised: 02/28/2025] [Accepted: 03/02/2025] [Indexed: 04/16/2025]
Abstract
Antibiotic resistance genes (ARGs) pose significant environmental health problems and have become a major global concern. This study investigated the efficacy and mechanism of the Cl2-UV process (chlorine followed by UV irradiation) for removing ARGs in various forms. The Cl2-UV process caused irreversible damage to nearly all ARB at typical disinfectant dosages. In solutions containing only extracellular ARGs (eARGs), the Cl₂-UV process achieved over 99.0 % degradation of eARGs. When both eARGs and intracellular ARGs (iARGs) were present, the process reached a 97.2 % removal rate for iARGs. While the abundance of eARGs initially increased due to the release of iARGs from lysed cells during pre-chlorination, subsequent UV irradiation rapidly degraded the released eARGs, restoring their abundance to near-initial levels by the end of the Cl₂-UV process. Analysis of the roles in degrading eARGs and iARGs during the Cl2-UV process revealed that UV, rather than free radicals, was the dominant factor causing ARG damage. Pre-chlorination enhanced direct UV damage to eARGs and iARGs by altering plasmid conformation and promoting efficient damage to high UV-absorbing cellular components. Furthermore, no further natural transformation of residual ARGs occurred following the Cl2-UV treatment. This study demonstrated strong evidence for the effectiveness of the Cl2-UV process in controlling antibiotic resistance.
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Affiliation(s)
- Jingyi Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Weiguang Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Xuhui Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xinran Zhang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Xinming Guo
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Caihua Bai
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Longyi Lv
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China.
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35
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Paracini N, Correa Y, Del Giudice R, Moulin M, Pichler H, Bengtsson E, Forsyth VT, Skoda MWA, Clifton LA, Cárdenas M. The interaction of human serum components with model membranes containing phospholipids and lipopolysaccharides. J Colloid Interface Sci 2025; 688:150-160. [PMID: 39999488 DOI: 10.1016/j.jcis.2025.02.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2024] [Revised: 02/12/2025] [Accepted: 02/18/2025] [Indexed: 02/27/2025]
Abstract
Lipoproteins, key mediators of lipid transport, facilitate the bidirectional transfer of lipids such as fatty acids, triglycerides, and cholesterol between soluble particles and cell membranes. High-density lipoproteins (HDL) primarily engage in reverse cholesterol transport, while low-density lipoproteins (LDL) predominantly deposit lipids, affecting cardiovascular health with a well-known role in the formation of the atherosclerotic plaque. In addition, lipoproteins play an important role in neutralizing bacterial lipopolysaccharides (LPS), the major component of Gram-negative bacterial outer membranes, which act as potent TLR4 agonists and can trigger severe immune responses. Lipoproteins bind LPS in plasma, with HDL showing strong binding affinity and LDL contributing to LPS clearance under specific conditions. Here, we explore the interaction of LDL and human serum albumin (HSA), another serum lipid-binding protein, with model lipid bilayers containing either phospholipids or LPS. Using neutron reflectometry and attenuated total reflection infrared spectroscopy, we characterize lipid transfer processes influenced by calcium levels and lipid composition. Calcium plays a key role in receptor-mediated LDL binding, but less is known on its effect on LDL-mediated lipid transfer in the absence of LDL receptors. Our results show that elevated calcium levels enhance stable LDL adsorption onto mammalian phospholipid-cholesterol membranes, promoting lipid cargo deposition despite the absence of specific LDL-receptors. Conversely, LDL showed no stable binding to LPS reconstituted in asymmetric outer membrane models but was able to deposit phospholipids in the membrane. In contrast, HSA removed lipids from mammalian membranes and exhibited minimal interaction with LPS-containing models. The findings elucidate the distinct lipid exchange mechanisms of LDL and HSA and their roles in modulating lipid transfer at membrane interfaces. Receptor-free enhanced LDL lipid deposition in calcium-enriched environments may have implications for cardiovascular disease progression. Conversely, the minimal interaction of LDL with bacterial LPS suggests a limited ability to extract LPS from membrane environments. This study provides structural insights into the interplay between lipoproteins, calcium, and membrane composition, with relevance to atherosclerosis and systemic endotoxemia.
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Affiliation(s)
- Nicolò Paracini
- Biofilms - Research Center for Biointerfaces and Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden.
| | - Yubexi Correa
- Biofilms - Research Center for Biointerfaces and Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden
| | - Rita Del Giudice
- Biofilms - Research Center for Biointerfaces and Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden
| | - Martine Moulin
- Biology, Deuteration, Chemistry and Soft Matter Group, Institute Laue Langevin and Partnership for Structural Biology, Grenoble F-38042, France
| | - Harald Pichler
- Austrian Centre of Industrial Biotechnology, Petersgasse 14, 8010 Graz, Austria; Graz University of Technology, Institute of Molecular Biotechnology, NAWI Graz, BioTechMed Graz, Petersgasse 14, 8010 Graz, Austria
| | - Eva Bengtsson
- Biofilms - Research Center for Biointerfaces and Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden; Department of Clinical Sciences Malmö, Lund University, Sweden
| | - V Trevor Forsyth
- Faculty of Medicine, Lund University, Sweden; LINXS Institute for Advanced Neutron and X-ray Science, Scheelevägen 19, 223 70 Lund, Sweden
| | - Maximilian W A Skoda
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, United Kingdom
| | - Luke A Clifton
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, United Kingdom
| | - Marité Cárdenas
- Biofilms - Research Center for Biointerfaces and Department of Biomedical Science, Faculty of Health and Society, Malmö University, 20506 Malmö, Sweden; Instituto Biofisika, Fundación Biofisika Bizkaia (UPV/CSIC), Leioa, Spain; Ikerbasque, Basque Foundation for Science, Bilbao, Spain.
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36
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Yu C, He Q, Nie WB, Zhang T, Wu H, Yang Y, Fu S, Tan X, Chen Y. Effluent organic matter facilitates anaerobic methane oxidation coupled with nitrous oxide reduction in river sediments. WATER RESEARCH 2025; 278:123415. [PMID: 40049094 DOI: 10.1016/j.watres.2025.123415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2024] [Revised: 02/26/2025] [Accepted: 02/27/2025] [Indexed: 04/14/2025]
Abstract
Effluent organic matter (EfOM) from wastewater treatment plants (WWTPs) contains humic-like substances that function as electron shuttles, thereby facilitating microbially-mediated redox reactions. However, the mechanisms governing the coupled processes of anaerobic oxidation of methane (CH4) (AOM) and nitrous oxide (N2O) reduction in river sediments, which receive WWTPs effluents, remain poorly understood. In this study, an incubation experiment with anoxic river sediments was conducted to assess the impacts of EfOM on AOM and nitrous oxide reduction using different effluent dilution ratios. The results showed that EfOM significantly enhanced both processes. Specifically, the AOM rate increased from 8.1 to 14.3 μg gdw-1 d-1, while the N2O reduction rate increased from 29.2 to 56.5 μg gdw-1 d-1. The results of batch tests demonstrated that AOM process enhanced N2O reduction in the presence of EfOM, highlighting the critical role of EfOM in linking these processes. Nitrate-dependent anaerobic methane oxidation (n-DAMO) archaea and denitrifying bacteria dominated the sediment incubated with EfOM. Metagenomic and metatranscriptomic analyses revealed that the denitrifying bacteria exclusively reduce N2O, confirming the role of EfOM in facilitating electron transfer between n-DAMO archaea and N2O reducers. This indicates that effluent discharge could be a potential factor driving the concurrent sinks of methane and nitrous oxide, offering a perspective for investigating the impacts of WWTPs effluent on greenhouse gas sinks in freshwater ecosystems.
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Affiliation(s)
- Chenhui Yu
- College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Qiang He
- College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Wen-Bo Nie
- College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
| | - Tanglong Zhang
- College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Hao Wu
- College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Yulong Yang
- College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Shibo Fu
- College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Xin Tan
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China; School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Yi Chen
- College of Environment and Ecology, Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
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Zeng R, Yang LH, Zhai SY, Liu CY, Lin N, Ou-Yang QH, Xu YH, Wang AJ, Cheng HY. Phenol-driven ammonium recovery from coal chemical wastewater in a bioelectrochemical system (BES). JOURNAL OF HAZARDOUS MATERIALS 2025; 490:137791. [PMID: 40024125 DOI: 10.1016/j.jhazmat.2025.137791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2024] [Revised: 01/28/2025] [Accepted: 02/27/2025] [Indexed: 03/04/2025]
Abstract
Bioelectrochemical systems (BES) have gained considerable attention in the past decade as a potentially sustainable and cost-effective method for coal chemical wastewater (CCW) treatment. However, a scarcity of studies focusing on the recovery NH4+-N in the recycling treatment of CCW via BES technology. In this study, a BES-ammonium recovery system (BES-ARS) was proposed to remove phenol and NH4+-N simultaneously, while NH4+-N was further recovered in a downstream recovery unit. Through systematic evaluation, we identified optimal condition for both phenol and NH4+-N removal. Specifically, an influent phenol-to-ammonium ratio of 2.0 was found to be ideal for maximizing simultaneous removal efficiency. Additionally, an evaluation of the nitrogen distribution showed that 97.9 % of NH4+-N migrated to the cathode chamber, with 82.5 % of NH4+-N being recovered in the absorbent under optimal condition. Furthermore, the solution not only reduces operational costs by up to 68 % compared to conventional treatments, but also conserves energy. This study presents an efficient and environmentally friendly treatment method for treating CCW, while recovering NH4+-N as a valuable resource.
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Affiliation(s)
- Ran Zeng
- College of Civil Engineering, Nanjing Tech University, Nanjing 211800, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Li-Hui Yang
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan 523808, China
| | - Si-Yuan Zhai
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
| | - Cheng-Yan Liu
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Na Lin
- Shenshui Hynar Water Group Co., Ltd., Shenzhen 518055, China
| | | | - Yan-Hua Xu
- College of Civil Engineering, Nanjing Tech University, Nanjing 211800, China
| | - Ai-Jie Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Hao-Yi Cheng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
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Wang S, Li T, Yuan X, Yu J, Luan Z, Guo Z, Yu Y, Liu C, Duan C. Biotic and abiotic drivers of soil carbon, nitrogen and phosphorus and metal dynamic changes during spontaneous restoration of Pb-Zn mining wastelands. JOURNAL OF HAZARDOUS MATERIALS 2025; 490:137818. [PMID: 40054196 DOI: 10.1016/j.jhazmat.2025.137818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2024] [Revised: 02/11/2025] [Accepted: 02/28/2025] [Indexed: 04/16/2025]
Abstract
The biotic and abiotic mechanisms that drive important biogeochemical processes (carbon, nitrogen, phosphorus and metals dynamics) in metal mine revegetation remains elusive. Metagenomic sequencing was used to explored vegetation, soil properties, microbial communities, functional genes and their impacts on soil processes during vegetation restoration in a typical Pb-Zn mine. The results showed a clear niche differentiation between bacteria, fungi and archaea. Compared to bacteria and fungi, the archaea richness were more tightly coupled with natural restoration changes. The relative abundances of CAZyme-related, denitrification-related and metal resistance genes reduced, while nitrification, urease, inorganic phosphorus solubilisation, phosphorus transport, and phosphorus regulation -related genes increased. Redundancy analysis, hierarchical partitioning analysis, relative-importance analysis and partial least squares path modelling, indicated that archaea diversity, primarily influenced by available lead, directly impacts carbon dynamics. Functional genes, significantly affected by available cadmium, directly alter nitrogen dynamics. Additionally, pH affects phosphorus dynamics through changes in bacterial diversity, while metal dynamics are directly influenced by vegetation. These insights elucidate natural restoration mechanisms in mine and highlight the importance of archaea in soil processes.
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Affiliation(s)
- Sichen Wang
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China; Yunnan International Joint Research Center of Plateau Lake Ecological Restoration and Watershed Management, Yunnan University, Kunming 650091, China; Instititue of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Trans-Boundary Eco-security, Yunnan University, Kunming 650091, China
| | - Ting Li
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China; Yunnan International Joint Research Center of Plateau Lake Ecological Restoration and Watershed Management, Yunnan University, Kunming 650091, China
| | - Xinqi Yuan
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China; Yunnan International Joint Research Center of Plateau Lake Ecological Restoration and Watershed Management, Yunnan University, Kunming 650091, China
| | - Ji Yu
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China; Yunnan International Joint Research Center of Plateau Lake Ecological Restoration and Watershed Management, Yunnan University, Kunming 650091, China
| | - Zhifei Luan
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China; Yunnan International Joint Research Center of Plateau Lake Ecological Restoration and Watershed Management, Yunnan University, Kunming 650091, China
| | - Zhaolai Guo
- Yunnan Provincial Innovative Research Team of Environmental Pollution, Food Safety, and Human Health, Institute of Environmental Remediation and Human Health, School of Ecology and Environment, Southwest Forestry University, Kunming 650224, China
| | - Yadong Yu
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China; Yunnan International Joint Research Center of Plateau Lake Ecological Restoration and Watershed Management, Yunnan University, Kunming 650091, China
| | - Chang'e Liu
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China; Yunnan International Joint Research Center of Plateau Lake Ecological Restoration and Watershed Management, Yunnan University, Kunming 650091, China
| | - Changqun Duan
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, China; Yunnan International Joint Research Center of Plateau Lake Ecological Restoration and Watershed Management, Yunnan University, Kunming 650091, China.
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Badra M, Freudenthal J, Dumack K. Sludge retention time in anaerobic digestion affects Archaea by a cascade through microeukaryotes. WATER RESEARCH 2025; 278:123371. [PMID: 40037099 DOI: 10.1016/j.watres.2025.123371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2024] [Revised: 01/28/2025] [Accepted: 02/22/2025] [Indexed: 03/06/2025]
Abstract
Anaerobic digestion is a crucial process for treating organic waste, such as wastewater sludge, agricultural residues and food waste. While the influence of physicochemical parameters on the prokaryotic community composition in anaerobic digesters has been extensively characterized, the role of biotic interactions in shaping the prokaryotic communities remains poorly understood. This study addresses this knowledge gap by analyzing the complete active microbiome of nine full-scale anaerobic digesters. Our findings reveal that eukaryotes, consisting primarily of protists and fungi, account for approximately 40 % of RNA sequence reads alongside dominant Archaea, indicating their substantial role in the digestion process. Our results suggest that the chosen sludge retention time during anaerobic digestion indirectly affects the archaeal community composition and thus treatment efficacy by cascading through eukaryotes, highlighting their integral role in the system. This study highlights the critical role of eukaryotes in regulating prokaryotic communities and their indirect contribution to the optimization of anaerobic digestion efficiency.
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Affiliation(s)
- Maria Badra
- University of Cologne, Terrestrial Ecology, Institute of Zoology, Zülpicher Str. 47b, 50674 Köln, Germany
| | - Jule Freudenthal
- University of Cologne, Terrestrial Ecology, Institute of Zoology, Zülpicher Str. 47b, 50674 Köln, Germany
| | - Kenneth Dumack
- University of Cologne, Terrestrial Ecology, Institute of Zoology, Zülpicher Str. 47b, 50674 Köln, Germany.
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Luo J, Jin H, Tian W, Niu Z, Zhang J, Wang T, Zhou M. The enhanced effect and mechanism of endogenous sigma factor RpoF on bioelectricity generation in Pseudomonas aeruginosa-inoculated Microbial fuel cells (MFCs). Biosens Bioelectron 2025; 278:117380. [PMID: 40112519 DOI: 10.1016/j.bios.2025.117380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2024] [Revised: 01/21/2025] [Accepted: 03/14/2025] [Indexed: 03/22/2025]
Abstract
Microbial fuel cells (MFCs) has attracted tremendous attention due to integrating clean energy generation and wastewater treatment. Electricigens are in charge of electron transfer and energy conversion, and therefore strain improvement is crucial for MFCs performance. Herein, the overexpression of sigma factor RpoF and the combined manipulation with other regulators (PmpR and RpoS) reinforced electricity generation of a model strain Pseudomonas aeruginosa PAO1. Next, RpoF was introduced into an isolate P. aeruginosa P2-A-12 with higher electroactivity, which not only yielded 3.2-fold increase in the maximal power density under non stress, but also generated 21.4 % improvement under 1.5 % NaCl. The comprehensive analysis at the levels of cells, metabolites and genes transcription ascertained its global regulatory mechanism, mainly including the enhanced biofilm formation by promoting cell attachment and cell-to-cell adhesion on the anode, more c-di-GMP and quorum sensing (QS) signal molecules accumulation, and the increase in phenazine-1-carboxamide (PCN), pyocyanin (PYO) and 1-hydroxyphenazine (1-OHPHZ) by controlling the expression levels of multiple genes involved in core biosynthesis and QS system. It was the first time to demonstrate the direct activation of RpoF on phzH responsible for PCN production and rhlR regulating N-butanoyl-HSL (C4-HSL) synthesis. Bioinformatic analysis indicated that the complex biological function of RpoF was closely linked with the conservation and diversity of sequences from various microorganisms. These findings strongly substantiated that RpoF acted as an efficient element to simultaneously optimize P. aeruginosa traits (such as electroactivity and stress tolerance) suitable for the practical MFCs, also broadened the theoretical recognition on its regulatory mechanism.
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Affiliation(s)
- Jianmei Luo
- Key Laboratory of Industrial Fermentation Microbiology (Tianjin University of Science &Technology), Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, PR China.
| | - Hongchen Jin
- Key Laboratory of Industrial Fermentation Microbiology (Tianjin University of Science &Technology), Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, PR China
| | - Wanjun Tian
- Key Laboratory of Industrial Fermentation Microbiology (Tianjin University of Science &Technology), Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, PR China
| | - Zhengshu Niu
- Key Laboratory of Industrial Fermentation Microbiology (Tianjin University of Science &Technology), Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, PR China
| | - Jingmei Zhang
- Key Laboratory of Industrial Fermentation Microbiology (Tianjin University of Science &Technology), Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, PR China
| | - Tingting Wang
- Key Laboratory of Industrial Fermentation Microbiology (Tianjin University of Science &Technology), Ministry of Education, Tianjin Key Lab of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, PR China
| | - Minghua Zhou
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China.
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Guo T, Du LY, Liu MF, Zhou XJ, Chen XR. Correlations of vancomycin trough concentration and its efficacy and toxicity in patients in the intensive care unit. World J Clin Cases 2025; 13:102866. [DOI: 10.12998/wjcc.v13.i16.102866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2024] [Revised: 12/24/2024] [Accepted: 01/09/2025] [Indexed: 02/10/2025] Open
Abstract
BACKGROUND Plasma concentration monitoring is crucial for optimizing vancomycin use, particularly in patients in the intensive care unit (ICU). However, the reference interval for vancomycin plasma concentration remains undetermined.
AIM To evaluate the correlations of area under the curve (AUC0-24) and trough concentration (Cmin) with efficacy and nephrotoxicity in patients in the ICU.
METHODS A total of 103 patients treated with vancomycin for methicillin-resistant Staphylococcus aureus infections were analyzed in this study. The associations of clinicodemographic characteristics (including sex, age, weight, infection sites, main etiologies of ICU cases, comorbidities, acute physiological chronic health evaluation II score, and mechanical ventilation) and pharmacokinetics (daily dose, Cmin, AUC0-24, and AUC0-24/minimum inhibitory concentration) with efficacy and nephrotoxicity of vancomycin were evaluated with univariate and multivariate logistic regression analyses. AUC0-24 was calculated using VCM-TDM software based on vancomycin population pharmacokinetics and Bayesian feedback method.
RESULTS Cmin over 9.4 μg/mL and AUC0-24 exceeding 359.6 μg × hour/mL indicated good efficacy against infection. Cmin below 14.0 μg/mL predicted no significant nephrotoxicity.
CONCLUSION In this study, the effective and safe concentration interval for vancomycin in patients in the ICU was Cmin 9.4-14.0 μg/mL. Close attention should be paid to adverse effects and renal function during vancomycin treatment.
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Affiliation(s)
- Teng Guo
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Hebei Key Laboratory of Clinical Pharmacy, Shijiazhuang 050011, Hebei Province, China
| | - Li-Ying Du
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Hebei Key Laboratory of Clinical Pharmacy, Shijiazhuang 050011, Hebei Province, China
| | - Ming-Feng Liu
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Hebei Key Laboratory of Clinical Pharmacy, Shijiazhuang 050011, Hebei Province, China
| | - Xia-Jin Zhou
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Hebei Key Laboratory of Clinical Pharmacy, Shijiazhuang 050011, Hebei Province, China
| | - Xin-Ran Chen
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Hebei Key Laboratory of Clinical Pharmacy, Shijiazhuang 050011, Hebei Province, China
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Saha KK, Mandal S, Barman A, Chatterjee S, Mandal NC. Deciphering the genomic and physiological basis of pH dependent siderophore production in Enterobacter sp. DRP3 and mitigation of lead stress in rice seedlings. JOURNAL OF HAZARDOUS MATERIALS 2025; 489:137587. [PMID: 39954437 DOI: 10.1016/j.jhazmat.2025.137587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2024] [Revised: 01/26/2025] [Accepted: 02/10/2025] [Indexed: 02/17/2025]
Abstract
Anthropogenic activities like heavy metal pollution exert the most devastating effect on agriculture. Siderophores are small peptides capable to chelate iron and different heavy metals; thereby reduce metal toxicity. However, very little information is available about their physiology (siderophore types, effect of temperature, pH, toxic metals), and especially of their gene expression patterns. Here, we have carried out a detailed study on siderophore production dynamics along with their gene expression pattern in Enterobacter sp. DRP3. DRP3 was able to produce two different types of siderophores hydroxamate type (19.81 µg ml-1) during early stages and catecholate type (59.52 µg ml-1) later stages of its growth, especially at pH-6.8. DRP3 was able to produce similar concentrations of siderophores even under high lead concentrations. Further whole genome analysis has revealed the presence of enterobactin and aerobactin gene clusters. Quantitative real-time PCR observed a 5.02-fold and 1.90-fold overexpression of the enterobactin biosynthesis genes entC and entF, respectively, and a 3.12-fold upregulation of the aerobactin biosynthesis gene iucC in the absence of exogenously added Fe3+ by DRP3. Our study also highlighted that following root colonization DRP3 is excellent in mitigating Pb(II) stress in rice seedlings while promoting iron content and reducing lead content in plant tissue.
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Affiliation(s)
- Kunal Kumar Saha
- Mycology and Plant Pathology Laboratory, Department of Botany, Visva Bharati, Santiniketan, West Bengal, India
| | - Subhrangshu Mandal
- Stress Physiology and Environmental Microbiology Laboratory, Department of Botany, Visva Bharati, Santiniketan, West Bengal, India.
| | - Anik Barman
- Department of Microbiology, Bose Institute, P-1/12 CIT Scheme VIIM, Kolkata 700054, India
| | - Sumit Chatterjee
- Department of Biological Sciences, Bose Institute, Kolkata 700091, India
| | - Narayan Chandra Mandal
- Mycology and Plant Pathology Laboratory, Department of Botany, Visva Bharati, Santiniketan, West Bengal, India.
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Das M, Kiruthiga C, Shafreen RB, Nachammai K, Selvaraj C, Langeswaran K. Harnessing the human microbiome and its impact on immuno-oncology and nanotechnology for next-generation cancer therapies. Eur J Pharmacol 2025; 996:177436. [PMID: 40023356 DOI: 10.1016/j.ejphar.2025.177436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2024] [Revised: 02/14/2025] [Accepted: 02/26/2025] [Indexed: 03/04/2025]
Abstract
The integration of microbiome research and nanotechnology represents a significant advancement in immuno-oncology, potentially improving the effectiveness of cancer immunotherapies. Recent studies highlight the influential role of the human microbiome in modulating immune responses, presenting new opportunities to enhance immune checkpoint inhibitors (ICIs) and other cancer therapies. Nanotechnology offers precise drug delivery and immune modulation capabilities, minimizing off-target effects while maximizing therapeutic outcomes. This review consolidates current knowledge on the interactions between the microbiome and the immune system, emphasizing the microbiome's impact on ICIs, and explores the incorporation of nanotechnology in cancer treatment strategies. Additionally, it provides a forward-looking perspective on the synergistic potential of microbiome modulation and nanotechnology to overcome existing challenges in immuno-oncology. This integrated approach may enhance the personalization and effectiveness of next-generation cancer treatments, paving the way for transformative patient care.
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Affiliation(s)
- Mamali Das
- Department of Biomedical Science, Alagappa University, Karaikudi, 630003, India
| | | | - R Beema Shafreen
- Department of Biomedical Science, Alagappa University, Karaikudi, 630003, India
| | - Kathiresan Nachammai
- Department of Biotechnology, Alagappa University, Science Campus, Karaikudi, Tamil Nadu, India
| | - Chandrabose Selvaraj
- CsrDD Lab, Department of Microbiology, Dr. D. Y. Patil Medical College Hospital & Research Centre, Dr. D. Y. Patil Vidyapeeth (Deemed to Be University), Pimpri, Pune, 411018, India.
| | - K Langeswaran
- Department of Biomedical Science, Alagappa University, Karaikudi, 630003, India; Department of Biotechnology, Alagappa University, Science Campus, Karaikudi, Tamil Nadu, India.
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Oba S, Hosoya T, Kawata D, Komiya Y, Iwai H, Koike R, Miyamoto S, Kanno T, Ainai A, Suzuki T, Hasegawa H, Yasuda S. Iguratimod, a promising therapeutic agent for COVID-19 that attenuates excessive inflammation in mouse models. Eur J Pharmacol 2025; 996:177537. [PMID: 40147575 DOI: 10.1016/j.ejphar.2025.177537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2024] [Revised: 03/18/2025] [Accepted: 03/20/2025] [Indexed: 03/29/2025]
Abstract
In severe COVID-19 patients, excessive inflammation can lead to multiorgan dysfunction. Current anti-inflammatory treatments like glucocorticoids partially improve the outcomes, while immune systems are compromised. We have identified that SARS-CoV-2-infected obese mice were a good model of the cytokine storm seen in COVID-19. Here, we revealed that iguratimod (IGU), an approved agent for rheumatoid arthritis, improved survival by attenuating inflammation with minimal immune suppression. In this study, C57BL/6 mice were fed a high-fat diet (HFD) or a normal-fat diet (NFD) for ten weeks before being infected with a mouse-adapted SARS-CoV-2. IGU significantly improved survival rates and reduced lung inflammation in HFD-fed mice, with minimal impact on interferon-induced genes and viral load. Meanwhile, dexamethasone (DEX) did not improve survival, while it suppressed various immune reactions with different mechanisms to IGU. Interestingly, IGU-treated mice had fewer SARS-CoV-2 positive cells in the lung, although viral replication was comparable to the control mice. Neither IGU nor DEX inhibited the SARS-CoV-2 infection in Vero-E6 cells, unlike the antiviral agent, remdesivir. Of note, IGU was effective prophylactically and therapeutically in HFD mice, and showed beneficial effects in NFD-fed mice with a lethal dose exposure of SARS-CoV-2. We demonstrated that IGU could be a promising treatment for severe COVID-19, especially in obese patients, by fine-tuning inflammation without compromising antiviral immunity. This study supports the possibility of drug repositioning for IGU COVID-19 beyond autoimmune diseases.
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Affiliation(s)
- Seiya Oba
- Department of Rheumatology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan; Department of Pathology, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan
| | - Tadashi Hosoya
- Department of Rheumatology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan; Department of Pathology, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan.
| | - Daisuke Kawata
- Department of Rheumatology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan; Department of Pathology, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan
| | - Yoji Komiya
- Department of Rheumatology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan; Department of Pathology, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan
| | - Hideyuki Iwai
- Department of Rheumatology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan; Department of Pathology, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan
| | - Ryuji Koike
- Department of Rheumatology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan
| | - Sho Miyamoto
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan
| | - Takayuki Kanno
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan
| | - Akira Ainai
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan
| | - Tadaki Suzuki
- Department of Pathology, National Institute of Infectious Diseases, Tokyo, 208-0011, Japan
| | - Hideki Hasegawa
- WHO Collaborating Centre for Reference and Research on Influenza, Tokyo, Japan; Research Center for Influenza and Respiratory Virus, National Institute of Infectious Diseases, Tokyo, Japan
| | - Shinsuke Yasuda
- Department of Rheumatology, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan.
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Rossato Viana A, Aytar EC, Pippi N, Santos D, Rhoden CRB, Stefanello Vizzotto B, Flores EMM, Passaglia Schuch A, Krause LMF. Chemical composition, in vitro and in silico activity of the methanolic extract derived from Vassobia breviflora against clinically relevant bacteria. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2025; 88:463-478. [PMID: 39849319 DOI: 10.1080/15287394.2025.2453858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2025]
Abstract
This study aimed to identify chemical compounds derived from Vassobia breviflora methanolic extract using ESI-ToF-MS and their antioxidant potential activity utilizing the following methods: total phenols, DPPH, and ABTS•+. The MTT assay measured cytotoxic activity, while DCFH-DA and nitric oxide assays were employed to determine reactive oxygen species (ROS) and reactive nitrogen species (RNS) levels using African green monkey kidney (VERO) and human keratinocyte (HaCat) cell lines. The minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) were assessed in seven clinical isolates and nine ATCC strains. Biofilm inhibition was tested against four biofilm-forming strains. The antioxidant properties of the methanolic extract were identified as follows: 35.74 mg GAE/g (gallic acid equivalents)/g for total phenols, 10.5 µg/ml for DPPH, and 50.68 µmol trolox/µg for ABTS•+. The mean inhibitory concentration (IC50) values were 622.86 µg/ml (VERO) and 784.33 µg/ml (HaCat). These concentrations did not markedly alter levels of ROS and RNS. Conversely, Bacillus cereus β-hemolytic displayed higher sensitivity to the extract, with MIC of 64 µg/ml and MBC of 128 µg/ml. Enterococcus faecium exhibited the lowest biofilm formation among the tested bacteria. The studied plant exhibited activity against all bacterial strains at concentrations lower than the IC50 VERO and HaCat cells, suggesting potential for future studies. Data present a comprehensive molecular docking analysis against the HlyIIR protein (PDB ID: 2FX0) and determined antimicrobial and endocrine-modulating potentials. Notably, lancifodilactone I and nicandrin B demonstrated the strongest binding affinities, with binding energies of -9.8 kcal/mol and -8.3 kcal/mol, respectively, and demonstrated significant antimicrobial effects against B. cereus. In addition, several compounds showed potential interactions with nuclear receptors, indicating potential endocrine-modulating effects. These findings provide insights into developing target-specific antimicrobial therapies and endocrine-modulating agents.
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Affiliation(s)
- Altevir Rossato Viana
- Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Brazil
| | - Erdi Can Aytar
- Faculty of Agriculture, Department of Horticulture Uşak, Usak University, Türkiye
| | - Nickolas Pippi
- Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Brazil
| | - Daniel Santos
- Department of Chemistry, Federal University of Santa Maria, Santa Maria, Brazil
| | | | | | | | - André Passaglia Schuch
- Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Brazil
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Safaei S, Derakhshan-sefidi M, Karimi A. Wolbachia: A bacterial weapon against dengue fever- a narrative review of risk factors for dengue fever outbreaks. New Microbes New Infect 2025; 65:101578. [PMID: 40176883 PMCID: PMC11964561 DOI: 10.1016/j.nmni.2025.101578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2024] [Revised: 01/10/2025] [Accepted: 03/06/2025] [Indexed: 04/05/2025] Open
Abstract
Arboviruses constitute the largest known group of viruses and are responsible for various infections that impose significant socioeconomic burdens worldwide, particularly due to their link with insect-borne diseases. The increasing incidence of dengue fever in non-endemic regions underscores the urgent need for innovative strategies to combat this public health threat. Wolbachia, a bacterium, presents a promising biological control method against mosquito vectors, offering a novel approach to managing dengue fever. We systematically investigated biomedical databases (PubMed, Web of Science, Google Scholar, Science Direct, and Embase) using "AND" as a Boolean operator with keywords such as "dengue fever," "dengue virus," "risk factors," "Wolbachia," and "outbreak." We prioritized articles that offered significant insights into the risk factors contributing to the outbreak of dengue fever and provided an overview of Wolbachia's characteristics and functions in disease management, considering studies published until December 25, 2024. Field experiments have shown that introducing Wolbachia-infected mosquitoes can effectively reduce mosquito populations and lower dengue transmission rates, signifying its potential as a practical approach for controlling this disease.
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Affiliation(s)
- Sahel Safaei
- Department of Bacteriology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Wei F, Jiang X, Xu X, He D, Wu B, Diao Y, Tang Y. Isolation, identification and genetic variation analysis of avian orthoreovirus in commercial broilers in China from 2016 to 2021. Avian Pathol 2025; 54:340-350. [PMID: 39792438 DOI: 10.1080/03079457.2024.2435895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Revised: 10/10/2024] [Accepted: 11/26/2024] [Indexed: 01/12/2025]
Abstract
In the last decade, the emergence of variant strains of avian orthoreovirus (ARV) has caused an enormous economic impact on the poultry industry across China and other countries. This study aimed to evaluate the molecular evolution of the ARV lineages detected in Chinese commercial broiler farms. Firstly, ARV isolation and identification of commercial broiler arthritis cases from different provinces in China from 2016 to 2021 were conducted. A total of 51 pure ARV isolates were obtained. Sequencing results showed that there were five genotypes of the strains isolated in this study, of which genotype 1 ARV predominated, accounting for 56.9% (29/51). The whole gene sequences of 19 ARV representative isolates were successfully obtained. The genetic evolution analysis of 10 genome segments of 19 ARV isolates showed that the σC-encoding gene had evolved into six different lineages, while the other genome segments only differentiated into two to four different lineages. The results of recombination analysis showed that recombination events were present in the L3, M1 and S1 genome segments. Analysis of the variation of the key factor σC protein showed that the nucleotide and amino acid homologies of the σC were low among the different genotypes. Three-dimensional structural visualization analysis showed that all the structural changes of σC protein were concentrated in the spherical domain at the C-terminal, which is associated with host receptor binding.
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Affiliation(s)
- Feng Wei
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, Shandong, People's Republic of China
| | - Xiaoning Jiang
- Shandong Provincial Engineering Laboratory of Novel Pharmaceutical Excipients, Sustained and Controlled Release Preparations, School of Pharmacy, Dezhou University, Dezhou, People's Republic of China
| | - Xin Xu
- Guangzhou South China Biological Medicine CO., LTD, Guangzhou, People's Republic of China
| | - Dalin He
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, Shandong, People's Republic of China
| | - Bingrong Wu
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, Shandong, People's Republic of China
| | - Youxiang Diao
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, Shandong, People's Republic of China
| | - Yi Tang
- College of Animal Science and Technology, Shandong Agricultural University, Tai'an, Shandong, People's Republic of China
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Yanase R, Zeeshan M, Ferguson DJ, Markus R, Brady D, Bottrill AR, Holder AA, Guttery DS, Tewari R. Divergent Plasmodium kinases drive MTOC, kinetochore and axoneme organisation in male gametogenesis. Life Sci Alliance 2025; 8:e202403056. [PMID: 40127922 PMCID: PMC11933671 DOI: 10.26508/lsa.202403056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2024] [Revised: 03/10/2025] [Accepted: 03/11/2025] [Indexed: 03/26/2025] Open
Abstract
Sexual development and male gamete formation of the malaria parasite in the mosquito midgut are initiated by rapid endomitosis in the activated male gametocyte. This process is highly regulated by protein phosphorylation, specifically by three divergent male-specific protein kinases (PKs): CDPK4, SRPK1, and MAP2. Here, we localise each PK during male gamete formation using live-cell imaging, identify their putative interacting partners by immunoprecipitation, and determine the morphological consequences of their absence using ultrastructure expansion and transmission electron microscopy. Each PK has a distinct location in either the nuclear or the cytoplasmic compartment. Protein interaction studies revealed that CDPK4 and MAP2 interact with key drivers of rapid DNA replication, whereas SRPK1 is involved in RNA translation. The absence of each PK results in severe defects in either microtubule-organising centre organisation, kinetochore segregation, or axoneme formation. This study reveals the crucial role of these PKs during endomitosis in formation of the flagellated male gamete and uncovers some of their interacting partners that may drive this process.
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Affiliation(s)
- Ryuji Yanase
- School of Life Sciences, University of Nottingham, Nottingham, UK
- Department of Genetics, Genomics and Cancer Sciences, University of Leicester, Leicester, UK
| | - Mohammad Zeeshan
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - David Jp Ferguson
- Nuffield Department of Clinical Laboratory Sciences and John Radcliffe Hospital, University of Oxford, Oxford, UK
- Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK
| | - Robert Markus
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Declan Brady
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Andrew R Bottrill
- School of Life Sciences, Gibbet Hill Campus, University of Warwick, Coventry, UK
| | - Anthony A Holder
- Malaria Parasitology Laboratory, Francis Crick Institute, London, UK
| | - David S Guttery
- School of Life Sciences, University of Nottingham, Nottingham, UK
- Department of Genetics, Genomics and Cancer Sciences, University of Leicester, Leicester, UK
| | - Rita Tewari
- School of Life Sciences, University of Nottingham, Nottingham, UK
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49
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Opdam LV, Goetzfried SK, Polanco E, Bonnet S, Pandit A. Design and characterization of porphyrin-based photosensitizing metalloproteins integrated with artificial metalloenzymes for photocatalytic hydrogen production. J Inorg Biochem 2025; 267:112855. [PMID: 39986136 DOI: 10.1016/j.jinorgbio.2025.112855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2024] [Revised: 01/28/2025] [Accepted: 02/11/2025] [Indexed: 02/24/2025]
Abstract
Hydrogen is regarded as a promising alternative to fossil fuels. A desirable method of its generation is via photocatalysis, combining photosensitizers and hydrogen-evolution catalysts in the presence of an electron donor. Inspired by natural photosynthesis, we designed photosensitizing artificial metalloproteins (ArMs) and integrated them with ArM-based catalysts for photocatalytic hydrogen production from water. Metal porphyrins based on protoporphyrin IX (PPIX) were employed as they are naturally abundant and are effective both as photosensitizers and hydrogen-evolution catalysts. Photosensitizing proteins were created by binding zinc (Zn)PPIX or ruthenium (Ru)PPIX to the haem acquisition system A from Pseudomonas aeruginosa (HasAp). The photosensitizer ArMs were combined with cobalt (Co)PPIX-myoglobin (Mb) or free CoPPIX as hydrogen evolution catalysts. We found that free CoPPIX could replace ZnPPIX or RuPPIX in HasAp, forming CoPPIX-HasAp or RuPPIX-CoPPIX-HasAp complexes with enhanced stability compared to CoPPIX-Mb. Photocatalytic hydrogen production was achieved upon irradiation at 435 nm (ZnPPIX) or 385 nm (RuPPIX), using methyl viologen as an electron carrier and triethanolamine as an electron donor. The ZnPPIX-HasAp/CoPPIX-HasAp system remained intact and active for approximately 42 h, while Ru-based systems that were excited by UV light, exhibited signs of protein cleavage upon prolonged irradiation. These results demonstrate the potential of integrating porphyrin-based ArMs for photosensitization and hydrogen evolution, with HasAp providing a robust scaffold for sustained photocatalytic activity.
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Affiliation(s)
- L V Opdam
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2300 RA Leiden, the Netherlands; Bioénergétique et Ingénierie des Protéines, 13402 Marseille, France
| | - S K Goetzfried
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2300 RA Leiden, the Netherlands; Stratingh Institute for Chemistry, University of Groningen, 9747 AG Groningen, The Netherlands
| | - E Polanco
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2300 RA Leiden, the Netherlands
| | - S Bonnet
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2300 RA Leiden, the Netherlands
| | - A Pandit
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2300 RA Leiden, the Netherlands.
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50
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Liu H, Zhou Z, Long C, Qing T, Feng B, Zhang P, Chen YP. Light/dark synergy enhances cyanophycin accumulation in algal-bacterial consortia: Boosted strategy for nitrogen recovery from wastewater. BIORESOURCE TECHNOLOGY 2025; 425:132309. [PMID: 40023333 DOI: 10.1016/j.biortech.2025.132309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2024] [Revised: 02/16/2025] [Accepted: 02/25/2025] [Indexed: 03/04/2025]
Abstract
Recovering the nitrogen-rich biopolymer cyanophycin [(β-Asp-Arg)n] from algal-bacterial consortia enhances the reclamation of value-added chemicals from wastewater. However, the modulation of light/dark conditions on cyanophycin accumulation remain unknown. In this study, the trends and mechanisms of cyanophycin synthesis in algal-bacterial consortia under light/dark conditions were investigated. The results showed that cyanophycin production during the dark periods ranged from 137-150 mg/g MLSS (mixed liquid suspended solids), which was 32 %-38 % higher than those during the light period (p < 0.001). Metatranscriptomics results demonstrated that 50 metagenome-assembled genomes contribute to cyanophycin production, with the Planktothrix genus being the dominant contributor. Metabolomics findings suggested that algal-bacterial consortia produce higher level of arginine for cyanophycin synthesis under light conditions. This study demonstrates the feasibility of increasing cyanophycin production by merging light/dark cycles, and offers a novel strategy for high yield of valuable biopolymers from wastewater substrate.
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Affiliation(s)
- Hongyuan Liu
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Zirui Zhou
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Caicheng Long
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Taiping Qing
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Bo Feng
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Peng Zhang
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China.
| | - You-Peng Chen
- College of Environment and Ecology, Chongqing University, Chongqing 400000, China
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